diff --git a/app/views/modern_styles.py b/app/views/modern_styles.py
index 0b578ba..bd6bf1e 100644
--- a/app/views/modern_styles.py
+++ b/app/views/modern_styles.py
@@ -64,8 +64,9 @@ def apply_modern_styles() -> None:
     sidebar_bg = _mix(dark, bg, 0.18) if dark_theme else _mix(primary, "#000000", 0.10)
     sidebar_hover = _mix(sidebar_bg, "#ffffff", 0.07) if dark_theme else _mix(sidebar_bg, "#000000", 0.06)
     sidebar_selected = _mix(sidebar_bg, "#ffffff", 0.14) if dark_theme else _mix(sidebar_bg, "#000000", 0.10)
-    sidebar_fg = _mix(fg, bg, 0.05)
-    sidebar_muted = _mix(fg, sidebar_bg, 0.45)
+    # 侧栏背景在浅色主题下也偏深，文字颜色需按侧栏亮度自适应，避免“黑字不明显”。
+    sidebar_fg = "#F4F8FD" if _is_dark(sidebar_bg) else _mix(fg, bg, 0.05)
+    sidebar_muted = _mix(sidebar_fg, sidebar_bg, 0.45)
 
     # ---------------- 卡片 ----------------
     style.configure(
@@ -219,7 +220,7 @@ def apply_modern_styles() -> None:
             ("active", sidebar_hover),
             ("pressed", sidebar_selected),
         ],
-        foreground=[("active", "#ffffff" if dark_theme else sidebar_fg)],
+        foreground=[("active", "#ffffff" if _is_dark(sidebar_hover) else sidebar_fg)],
     )
     style.configure(
         "SidebarSelected.TButton",
diff --git a/app/views/panels/calman_panel.py b/app/views/panels/calman_panel.py
index 3b1d1ba..060e630 100644
--- a/app/views/panels/calman_panel.py
+++ b/app/views/panels/calman_panel.py
@@ -92,6 +92,85 @@ def _xy_to_upvp(x: float, y: float) -> tuple[float, float]:
     return up, vp
 
 
+def _hex_to_rgb(hex_color: str) -> tuple[int, int, int]:
+    c = hex_color.lstrip("#")
+    return int(c[0:2], 16), int(c[2:4], 16), int(c[4:6], 16)
+
+
+def _mix(hex_a: str, hex_b: str, ratio: float) -> str:
+    r1, g1, b1 = _hex_to_rgb(hex_a)
+    r2, g2, b2 = _hex_to_rgb(hex_b)
+    r = int(r1 * (1 - ratio) + r2 * ratio)
+    g = int(g1 * (1 - ratio) + g2 * ratio)
+    b = int(b1 * (1 - ratio) + b2 * ratio)
+    return f"#{r:02x}{g:02x}{b:02x}"
+
+
+def _is_dark_hex(hex_color: str) -> bool:
+    r, g, b = _hex_to_rgb(hex_color)
+    return (r * 299 + g * 587 + b * 114) / 1000 < 128
+
+
+def _get_calman_palette() -> dict[str, str]:
+    """根据当前主题生成 Calman 调试面板色板。"""
+    style = ttk.Style()
+    colors = style.colors
+    bg = colors.bg
+    fg = colors.fg
+    dark_mode = _is_dark_hex(bg)
+
+    if dark_mode:
+        figure_bg = _mix(bg, "#000000", 0.18)
+        axes_bg = _mix(bg, "#000000", 0.25)
+        grid = _mix(fg, axes_bg, 0.55)
+        tree_bg = _mix(bg, "#000000", 0.10)
+        tree_even = _mix(bg, "#ffffff", 0.03)
+        tree_odd = _mix(bg, "#ffffff", 0.07)
+        heading_bg = _mix(bg, "#ffffff", 0.12)
+        reading_bg = _mix(bg, "#ffffff", 0.06)
+        reading_fg = _mix(fg, "#ffffff", 0.06)
+        status_fg = _mix(fg, bg, 0.35)
+        reading_accent = colors.info
+        xy_series = "#d7dce4"
+        d65_mark = "#ffffff"
+    else:
+        figure_bg = _mix(bg, "#dfe7ef", 0.45)
+        axes_bg = _mix(bg, "#eff4f9", 0.72)
+        grid = _mix("#5f6f82", axes_bg, 0.55)
+        tree_bg = "#ffffff"
+        tree_even = "#ffffff"
+        tree_odd = "#f3f7fb"
+        heading_bg = _mix(colors.primary, "#ffffff", 0.82)
+        reading_bg = _mix(bg, "#e7eef5", 0.58)
+        reading_fg = fg
+        status_fg = _mix(fg, bg, 0.25)
+        reading_accent = _mix(colors.info, "#000000", 0.25)
+        xy_series = "#1f2a36"
+        d65_mark = "#253142"
+
+    return {
+        "figure_bg": figure_bg,
+        "axes_bg": axes_bg,
+        "fg": fg,
+        "grid": grid,
+        "metric_tile_bg": _mix(figure_bg, "#ffffff", 0.08 if dark_mode else 0.25),
+        "metric_tile_fg": reading_fg,
+        "status_fg": status_fg,
+        "reading_accent": reading_accent,
+        "reading_bg": reading_bg,
+        "reading_fg": reading_fg,
+        "tree_bg": tree_bg,
+        "tree_fg": reading_fg,
+        "tree_even": tree_even,
+        "tree_odd": tree_odd,
+        "tree_heading_bg": heading_bg,
+        "tree_heading_fg": reading_fg,
+        "tree_select": _mix(colors.info, figure_bg, 0.35),
+        "xy_series": xy_series,
+        "d65_mark": d65_mark,
+    }
+
+
 def _xyY_to_rgb_balance(x: float, y: float, big_y: float) -> tuple[float, float, float]:
     """把 xyY 近似映射到 RGB 比例，并归一到平均值 100。"""
     if y <= 0 or big_y <= 0:
@@ -114,17 +193,48 @@ def _xyY_to_rgb_balance(x: float, y: float, big_y: float) -> tuple[float, float,
     return (r / avg) * 100.0, (g / avg) * 100.0, (b / avg) * 100.0
 
 
-def _style_axes(ax, title: str) -> None:
-    ax.set_title(title, color=_FG, fontsize=9, pad=4)
-    ax.set_facecolor(_AX_BG)
-    ax.grid(True, color=_GRID, alpha=0.35, linewidth=0.6)
-    ax.tick_params(colors=_FG, labelsize=8)
+def _style_axes(self: "PQAutomationApp", ax, title: str) -> None:
+    palette = _get_calman_palette()
+    ax.set_title(title, color=palette["fg"], fontsize=9, pad=4)
+    ax.set_facecolor(palette["axes_bg"])
+    ax.grid(True, color=palette["grid"], alpha=0.35, linewidth=0.6)
+    ax.tick_params(colors=palette["fg"], labelsize=8)
     for spine in ax.spines.values():
-        spine.set_color("#8a8a8a")
+        spine.set_color(_mix(palette["fg"], palette["axes_bg"], 0.55))
+
+
+def _apply_calman_tree_style(self: "PQAutomationApp") -> None:
+    """应用矩阵 Treeview 的深浅色样式。"""
+    palette = _get_calman_palette()
+    style = ttk.Style()
+    style.configure(
+        "Calman.Treeview",
+        rowheight=22,
+        font=("Consolas", 9),
+        background=palette["tree_bg"],
+        fieldbackground=palette["tree_bg"],
+        foreground=palette["tree_fg"],
+    )
+    style.map(
+        "Calman.Treeview",
+        background=[("selected", palette["tree_select"])],
+        foreground=[("selected", palette["tree_fg"])],
+    )
+    style.configure(
+        "Calman.Treeview.Heading",
+        font=("微软雅黑", 9, "bold"),
+        background=palette["tree_heading_bg"],
+        foreground=palette["tree_heading_fg"],
+    )
+    if hasattr(self, "calman_metric_tree"):
+        self.calman_metric_tree.configure(style="Calman.Treeview")
+    if hasattr(self, "calman_data_tree"):
+        self.calman_data_tree.configure(style="Calman.Treeview")
 
 
 def create_calman_panel(self: "PQAutomationApp") -> None:
     """创建 CALMAN 风格灰阶测试面板，注册到 panel_manager。"""
+    palette = _get_calman_palette()
     self.calman_frame = ttk.Frame(self.content_frame)
     self.calman_visible = False
     self.calman_levels = list(DEFAULT_LEVELS_PCT)
@@ -152,7 +262,7 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     chart_frame.rowconfigure(2, weight=0)
     chart_frame.columnconfigure(0, weight=1)
 
-    fig = Figure(figsize=(10.5, 3.4), dpi=90, facecolor=_DARK_BG)
+    fig = Figure(figsize=(10.5, 3.4), dpi=90, facecolor=palette["figure_bg"])
     self.calman_fig = fig
     self.calman_ax_de = fig.add_subplot(141)
     self.calman_ax_rgb_line = fig.add_subplot(142)
@@ -163,7 +273,7 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     )
     canvas = FigureCanvasTkAgg(fig, master=chart_frame)
     canvas_widget = canvas.get_tk_widget()
-    canvas_widget.configure(bg=_DARK_BG, highlightthickness=0)
+    canvas_widget.configure(bg=palette["figure_bg"], highlightthickness=0)
     canvas_widget.grid(row=0, column=0, sticky=tk.NSEW)
     self.calman_canvas = canvas
 
@@ -181,11 +291,12 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     de_combo.pack(side=tk.LEFT, padx=(4, 10))
 
     self.calman_elapsed_var = tk.StringVar(value="Step: -- s | Total: -- s")
-    ttk.Label(
+    self.calman_elapsed_label = ttk.Label(
         control_row,
         textvariable=self.calman_elapsed_var,
-        foreground="#d0d0d0",
-    ).pack(side=tk.LEFT)
+        foreground=palette["status_fg"],
+    )
+    self.calman_elapsed_label.pack(side=tk.LEFT)
 
     metrics_row = ttk.Frame(chart_frame)
     metrics_row.grid(row=2, column=0, sticky=tk.EW, pady=(2, 0))
@@ -194,6 +305,7 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     self.calman_avg_cct_var = tk.StringVar(value="Avg CCT: --")
     self.calman_contrast_var = tk.StringVar(value="Contrast Ratio: --")
     self.calman_avg_gamma_var = tk.StringVar(value="Average Gamma: --")
+    self.calman_metric_labels = []
     for idx, v in enumerate(
         (
             self.calman_avg_de_var,
@@ -202,14 +314,16 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
             self.calman_avg_gamma_var,
         )
     ):
-        tk.Label(
+        lbl = tk.Label(
             metrics_row,
             textvariable=v,
             anchor=tk.CENTER,
-            fg="#f2f2f2",
-            bg="#373737",
+            fg=palette["metric_tile_fg"],
+            bg=palette["metric_tile_bg"],
             font=("微软雅黑", 10, "bold"),
-        ).grid(row=0, column=idx, sticky=tk.EW, padx=2)
+        )
+        lbl.grid(row=0, column=idx, sticky=tk.EW, padx=2)
+        self.calman_metric_labels.append(lbl)
 
     # ---------------------------- 顶部右：按钮列 ----------------------------
     btn_col = ttk.LabelFrame(root, text="操作", padding=6)
@@ -246,13 +360,14 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     ).pack(fill=tk.X, pady=2)
 
     self.calman_status_var = tk.StringVar(value="待机")
-    ttk.Label(
+    self.calman_status_label = ttk.Label(
         btn_col,
         textvariable=self.calman_status_var,
-        foreground="#555",
+        foreground=palette["status_fg"],
         wraplength=150,
         justify=tk.LEFT,
-    ).pack(fill=tk.X, pady=(8, 0))
+    )
+    self.calman_status_label.pack(fill=tk.X, pady=(8, 0))
 
     self.calman_progress_var = tk.StringVar(value="0 / 0")
     self.calman_progress = ttk.Progressbar(
@@ -269,14 +384,15 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     self.calman_reading_var = tk.StringVar(
         value="x: --   y: --   Y: --\nCCT: --   ΔE: --"
     )
-    ttk.Label(
+    self.calman_reading_summary_label = ttk.Label(
         btn_col,
         textvariable=self.calman_reading_var,
         font=("Consolas", 9),
-        foreground="#1f6fb2",
+        foreground=palette["reading_accent"],
         wraplength=160,
         justify=tk.LEFT,
-    ).pack(fill=tk.X, pady=(8, 0))
+    )
+    self.calman_reading_summary_label.pack(fill=tk.X, pady=(8, 0))
 
     # ---------------------------- 中部：灰阶色块（Target / Actual） ----------------------------
     patch_outer = ttk.LabelFrame(root, text="灰阶色块（点击可直接输出 Pattern）", padding=6)
@@ -390,24 +506,26 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
         "cd/m²: --\n"
         "ΔE2000: --"
     )
-    tk.Label(
+    self.calman_reading_detail_label = tk.Label(
         left,
         textvariable=self.calman_reading_var,
         justify=tk.LEFT,
         font=("Consolas", 10),
-        fg="#e5e5e5",
-        bg="#323232",
+        fg=palette["reading_fg"],
+        bg=palette["reading_bg"],
         width=22,
         padx=4,
         pady=4,
-    ).pack(fill=tk.X)
+    )
+    self.calman_reading_detail_label.pack(fill=tk.X)
 
-    xy_fig = Figure(figsize=(2.6, 2.2), dpi=90, facecolor=_DARK_BG)
+    xy_fig = Figure(figsize=(2.6, 2.2), dpi=90, facecolor=palette["figure_bg"])
+    self.calman_xy_fig = xy_fig
     self.calman_xy_ax = xy_fig.add_subplot(111)
     xy_fig.subplots_adjust(left=0.20, right=0.96, top=0.90, bottom=0.18)
     xy_canvas = FigureCanvasTkAgg(xy_fig, master=left)
     xy_widget = xy_canvas.get_tk_widget()
-    xy_widget.configure(bg=_DARK_BG, highlightthickness=0)
+    xy_widget.configure(bg=palette["figure_bg"], highlightthickness=0)
     xy_widget.pack(fill=tk.BOTH, expand=True, pady=(6, 0))
     self.calman_xy_canvas = xy_canvas
 
@@ -458,11 +576,7 @@ def create_calman_panel(self: "PQAutomationApp") -> None:
     for widget in (metric_tree, data_tree):
         widget.bind("<MouseWheel>", lambda e: _matrix_mousewheel(self, e))
 
-    style = ttk.Style()
-    style.configure("Calman.Treeview", rowheight=22, font=("Consolas", 9))
-    style.configure("Calman.Treeview.Heading", font=("微软雅黑", 9, "bold"))
-    self.calman_metric_tree.configure(style="Calman.Treeview")
-    self.calman_data_tree.configure(style="Calman.Treeview")
+    _apply_calman_tree_style(self)
 
     right.bind("<Configure>", lambda _e: _adaptive_matrix_columns(self))
 
@@ -796,6 +910,17 @@ def _adaptive_matrix_columns(self: "PQAutomationApp") -> None:
 
 def _redraw_calman_charts(self: "PQAutomationApp") -> None:
     """根据 calman_results 重绘四张图和 xy 散点。"""
+    palette = _get_calman_palette()
+    if hasattr(self, "calman_fig"):
+        self.calman_fig.patch.set_facecolor(palette["figure_bg"])
+    if hasattr(self, "calman_canvas"):
+        try:
+            self.calman_canvas.get_tk_widget().configure(
+                bg=palette["figure_bg"], highlightthickness=0
+            )
+        except Exception:
+            pass
+
     recs = sorted(self.calman_results.values(), key=lambda r: r["pct"])
     pcts = [r["pct"] for r in recs]
     de_vals = [r["de2000"] if r["de2000"] == r["de2000"] else 0 for r in recs]
@@ -834,7 +959,7 @@ def _redraw_calman_charts(self: "PQAutomationApp") -> None:
     # ΔE2000
     a1 = self.calman_ax_de
     a1.clear()
-    _style_axes(a1, "DeltaE 2000")
+    _style_axes(self, a1, "DeltaE 2000")
     if pcts:
         a1.bar(pcts, de_vals, color="#ffcf57", width=3.5)
     a1.set_xlim(-2, 102)
@@ -844,7 +969,7 @@ def _redraw_calman_charts(self: "PQAutomationApp") -> None:
     # RGB Balance 线图
     a2 = self.calman_ax_rgb_line
     a2.clear()
-    _style_axes(a2, "RGB Balance")
+    _style_axes(self, a2, "RGB Balance")
     if rgb_pcts:
         a2.plot(rgb_pcts, rgb_r, "-", color="#ff4d4d", linewidth=1.2)
         a2.plot(rgb_pcts, rgb_g, "-", color="#4caf50", linewidth=1.2)
@@ -857,7 +982,7 @@ def _redraw_calman_charts(self: "PQAutomationApp") -> None:
     # RGB Balance 条图（用最后一个点）
     a3 = self.calman_ax_rgb_bar
     a3.clear()
-    _style_axes(a3, "RGB Balance")
+    _style_axes(self, a3, "RGB Balance")
     if recs:
         last = recs[-1]
         bars = [
@@ -875,7 +1000,7 @@ def _redraw_calman_charts(self: "PQAutomationApp") -> None:
     # Gamma
     a4 = self.calman_ax_gamma
     a4.clear()
-    _style_axes(a4, "Gamma Log/Log")
+    _style_axes(self, a4, "Gamma Log/Log")
     if gamma_pcts:
         a4.plot(gamma_pcts, gamma_vals, "-", color="#ffe24d", linewidth=1.3)
     a4.axhline(TARGET_GAMMA, color="#9e9e9e", lw=0.8, ls="--")
@@ -889,21 +1014,32 @@ def _redraw_calman_charts(self: "PQAutomationApp") -> None:
 
 
 def _redraw_xy_chart(self: "PQAutomationApp") -> None:
+    palette = _get_calman_palette()
+    if hasattr(self, "calman_xy_fig"):
+        self.calman_xy_fig.patch.set_facecolor(palette["figure_bg"])
+    if hasattr(self, "calman_xy_canvas"):
+        try:
+            self.calman_xy_canvas.get_tk_widget().configure(
+                bg=palette["figure_bg"], highlightthickness=0
+            )
+        except Exception:
+            pass
+
     ax = self.calman_xy_ax
     ax.clear()
-    _style_axes(ax, "CIE 1931 xy")
+    _style_axes(self, ax, "CIE 1931 xy")
     ax.set_xlim(0.29, 0.34)
     ax.set_ylim(0.31, 0.35)
-    ax.plot([D65_X], [D65_Y], marker="x", color="#ffffff", markersize=7)
+    ax.plot([D65_X], [D65_Y], marker="x", color=palette["d65_mark"], markersize=7)
 
     recs = sorted(self.calman_results.values(), key=lambda r: r["pct"])
     if recs:
         xs = [r["x"] for r in recs]
         ys = [r["y"] for r in recs]
-        ax.plot(xs, ys, "o-", color="#000000", linewidth=1.0, markersize=3)
+        ax.plot(xs, ys, "o-", color=palette["xy_series"], linewidth=1.0, markersize=3)
         last = recs[-1]
         ax.plot([last["x"]], [last["y"]], marker="o", color="#ffcc00", markersize=5)
-        ax.plot([last["x"], D65_X], [last["y"], D65_Y], color="#c7c7c7", linewidth=0.8)
+        ax.plot([last["x"], D65_X], [last["y"], D65_Y], color=_mix(palette["fg"], palette["axes_bg"], 0.4), linewidth=0.8)
     self.calman_xy_canvas.draw_idle()
 
 
@@ -937,6 +1073,8 @@ def _update_target_strip(self: "PQAutomationApp") -> None:
 
 def _refresh_metric_table(self: "PQAutomationApp") -> None:
     """重绘下方矩阵表。"""
+    _apply_calman_tree_style(self)
+    palette = _get_calman_palette()
     metrics = [
         ("x CIE31", lambda r: _safe_float(r.get("x")) if r else "-"),
         ("y CIE31", lambda r: _safe_float(r.get("y")) if r else "-"),
@@ -971,17 +1109,54 @@ def _refresh_metric_table(self: "PQAutomationApp") -> None:
         self.calman_metric_tree.insert("", tk.END, iid=iid, values=(name,), tags=tags)
         self.calman_data_tree.insert("", tk.END, iid=iid, values=values, tags=tags)
 
-    self.calman_metric_tree.tag_configure("odd", background="#f5f7fa")
-    self.calman_metric_tree.tag_configure("even", background="#ffffff")
-    self.calman_data_tree.tag_configure("odd", background="#f5f7fa")
-    self.calman_data_tree.tag_configure("even", background="#ffffff")
+    self.calman_metric_tree.tag_configure(
+        "odd", background=palette["tree_odd"], foreground=palette["tree_fg"]
+    )
+    self.calman_metric_tree.tag_configure(
+        "even", background=palette["tree_even"], foreground=palette["tree_fg"]
+    )
+    self.calman_data_tree.tag_configure(
+        "odd", background=palette["tree_odd"], foreground=palette["tree_fg"]
+    )
+    self.calman_data_tree.tag_configure(
+        "even", background=palette["tree_even"], foreground=palette["tree_fg"]
+    )
 
     first, last = self.calman_data_tree.yview()
     self.calman_table_ysb.set(first, last)
 
 
+def refresh_calman_theme(self: "PQAutomationApp") -> None:
+    """主题切换后刷新 Calman 灰阶调试面板的表格与图表颜色。"""
+    if not hasattr(self, "calman_frame"):
+        return
+
+    palette = _get_calman_palette()
+
+    if hasattr(self, "calman_elapsed_label"):
+        self.calman_elapsed_label.configure(foreground=palette["status_fg"])
+    if hasattr(self, "calman_status_label"):
+        self.calman_status_label.configure(foreground=palette["status_fg"])
+    if hasattr(self, "calman_reading_summary_label"):
+        self.calman_reading_summary_label.configure(foreground=palette["reading_accent"])
+    if hasattr(self, "calman_reading_detail_label"):
+        self.calman_reading_detail_label.configure(
+            fg=palette["reading_fg"],
+            bg=palette["reading_bg"],
+        )
+    for lbl in getattr(self, "calman_metric_labels", []):
+        lbl.configure(
+            fg=palette["metric_tile_fg"],
+            bg=palette["metric_tile_bg"],
+        )
+
+    _refresh_metric_table(self)
+    _redraw_calman_charts(self)
+
+
 class CalmanPanelMixin:
     """挂载本模块的自由函数到 PQAutomationApp。"""
 
     create_calman_panel = create_calman_panel
     toggle_calman_panel = toggle_calman_panel
+    refresh_calman_theme = refresh_calman_theme
diff --git a/app/views/panels/main_layout.py b/app/views/panels/main_layout.py
index 3e22630..1219697 100644
--- a/app/views/panels/main_layout.py
+++ b/app/views/panels/main_layout.py
@@ -723,6 +723,16 @@ def _on_toggle_theme(self: "PQAutomationApp") -> None:
             self.apply_result_chart_theme()
         except Exception:
             pass
+    if hasattr(self, "log_gui") and hasattr(self.log_gui, "refresh_log_theme"):
+        try:
+            self.log_gui.refresh_log_theme()
+        except Exception:
+            pass
+    if hasattr(self, "refresh_calman_theme"):
+        try:
+            self.refresh_calman_theme()
+        except Exception:
+            pass
     # 同步刷新侧栏选中态（高亮样式跟随新色板）
     if hasattr(self, "update_sidebar_selection"):
         try:
diff --git a/app/views/pq_log_gui.py b/app/views/pq_log_gui.py
index 2ff97b4..ec05083 100644
--- a/app/views/pq_log_gui.py
+++ b/app/views/pq_log_gui.py
@@ -33,6 +33,55 @@ def _theme_colors():
     }
 
 
+def _normalize_hex(hex_color: str, fallback: str = "#808080") -> str:
+    """把颜色字符串规范化为 #RRGGBB；非法输入回退到 fallback。"""
+    if not isinstance(hex_color, str):
+        return fallback
+    c = hex_color.strip()
+    if not c:
+        return fallback
+    if c.startswith("#"):
+        c = c[1:]
+    if len(c) == 3:
+        c = "".join(ch * 2 for ch in c)
+    if len(c) != 6:
+        return fallback
+    try:
+        int(c, 16)
+    except ValueError:
+        return fallback
+    return f"#{c}"
+
+
+def _hex_to_rgb(hex_color: str):
+    c = _normalize_hex(hex_color, fallback="#808080").lstrip("#")
+    return int(c[0:2], 16), int(c[2:4], 16), int(c[4:6], 16)
+
+
+def _mix(hex_a: str, hex_b: str, ratio: float) -> str:
+    ratio = max(0.0, min(1.0, ratio))
+    r1, g1, b1 = _hex_to_rgb(hex_a)
+    r2, g2, b2 = _hex_to_rgb(hex_b)
+    r = int(r1 * (1 - ratio) + r2 * ratio)
+    g = int(g1 * (1 - ratio) + g2 * ratio)
+    b = int(b1 * (1 - ratio) + b2 * ratio)
+    return f"#{r:02x}{g:02x}{b:02x}"
+
+
+def _is_dark(hex_color: str) -> bool:
+    r, g, b = _hex_to_rgb(hex_color)
+    return (r * 299 + g * 587 + b * 114) / 1000 < 128
+
+
+def _auto_text_color(bg_hex: str, fg_hint: str) -> str:
+    """根据背景亮度给出稳定可读的文本颜色。"""
+    bg_hex = _normalize_hex(bg_hex, fallback="#f5f5f5")
+    fg_hint = _normalize_hex(fg_hint, fallback="#202020")
+    if _is_dark(bg_hex):
+        return _mix("#ffffff", fg_hint, 0.25)
+    return _mix("#000000", fg_hint, 0.25)
+
+
 class PQLogGUI(ttk.Frame):
     VALID_LEVELS = {"info", "success", "warning", "error", "debug", "separator", "blank"}
 
@@ -132,21 +181,44 @@ class PQLogGUI(ttk.Frame):
 
     def _configure_tags(self):
         palette = _theme_colors()
+        bg = self.log_text.cget("bg") or palette["text_bg"] or palette["bg"]
+        base_fg = _auto_text_color(bg, palette["fg"])
+        muted_fg = _mix(base_fg, bg, 0.45)
+        debug_level_color = _mix(palette["accent"], base_fg, 0.35)
+        debug_msg_color = _mix(palette["accent"], base_fg, 0.50)
         self.log_text.tag_configure("timestamp", foreground=palette["muted"])
         self.log_text.tag_configure("level_info", foreground=palette["accent"])
         self.log_text.tag_configure("level_success", foreground=palette["success"])
         self.log_text.tag_configure("level_warning", foreground=palette["warning"])
         self.log_text.tag_configure("level_error", foreground=palette["error"])
-        self.log_text.tag_configure("level_debug", foreground="#7c3aed")
-        self.log_text.tag_configure("message", foreground=palette["fg"])
+        self.log_text.tag_configure("level_debug", foreground=debug_level_color)
+        self.log_text.tag_configure("message", foreground=base_fg)
         self.log_text.tag_configure("message_success", foreground=palette["success"])
         self.log_text.tag_configure("message_warning", foreground=palette["warning"])
         self.log_text.tag_configure("message_error", foreground=palette["error"])
-        self.log_text.tag_configure("message_debug", foreground="#6d28d9")
-        self.log_text.tag_configure("separator", foreground=palette["muted"])
+        self.log_text.tag_configure("message_debug", foreground=debug_msg_color)
+        self.log_text.tag_configure("separator", foreground=muted_fg)
         self.log_text.tag_configure("traceback", foreground=palette["error"])
         self.log_text.tag_configure("blank", spacing1=4, spacing3=4)
 
+    def refresh_log_theme(self):
+        """主题切换后刷新日志控件的背景和字体颜色。"""
+        if threading.current_thread() is not threading.main_thread():
+            self.after(0, self.refresh_log_theme)
+            return
+
+        palette = _theme_colors()
+        bg = palette["text_bg"]
+        fg_hint = palette["text_fg"] if palette["text_fg"] else palette["fg"]
+        fg = _auto_text_color(bg, fg_hint)
+
+        self.log_text.configure(
+            bg=bg,
+            fg=fg,
+            insertbackground=fg,
+        )
+        self._configure_tags()
+
     def _append_message(self, message, level):
         lines = message.splitlines() or [""]
         for line in lines: