diff --git a/src/shared/types.ts b/src/shared/types.ts
index 42286f7..9d3a423 100644
--- a/src/shared/types.ts
+++ b/src/shared/types.ts
@@ -64,6 +64,8 @@ export type AccentTone =
 
 export interface AppSettings {
 	theme: "system" | "light" | "dark";
+	/** Dark appearance: grey ("dark") or near-black AMOLED ("darker"). */
+	darkTone: "dark" | "darker";
 	/** Accent tone for chrome and selection tint; graphite = neutral zinc. */
 	accent: AccentTone;
 	/** File-list icons: plain neutral glyphs, or per-category glyphs and colors. */
@@ -85,6 +87,7 @@ export interface AppSettings {
 
 export const DEFAULT_SETTINGS: AppSettings = {
 	theme: "system",
+	darkTone: "dark",
 	accent: "blue",
 	iconColors: "multi",
 	speedUnit: "MBps",
diff --git a/ui/src/app/settings.service.ts b/ui/src/app/settings.service.ts
index 6e9f0b9..86eafc7 100644
--- a/ui/src/app/settings.service.ts
+++ b/ui/src/app/settings.service.ts
@@ -1,10 +1,11 @@
-import { Injectable, inject, signal } from '@angular/core';
+import { Injectable, computed, inject, signal } from '@angular/core';
 import { DEFAULT_SETTINGS, type AppSettings } from '@shared/types';
 import { RpcService } from './rpc.service';
 
 @Injectable({ providedIn: 'root' })
 export class SettingsService {
   readonly theme = signal<AppSettings['theme']>(DEFAULT_SETTINGS.theme);
+  readonly darkTone = signal<AppSettings['darkTone']>(DEFAULT_SETTINGS.darkTone);
   readonly accent = signal<AppSettings['accent']>(DEFAULT_SETTINGS.accent);
   readonly iconColors = signal<AppSettings['iconColors']>(DEFAULT_SETTINGS.iconColors);
   readonly speedUnit = signal<AppSettings['speedUnit']>(DEFAULT_SETTINGS.speedUnit);
@@ -17,13 +18,23 @@ export class SettingsService {
 
   private readonly rpc = inject(RpcService);
 
+  /** Whether the app is actually rendering dark right now (drives the Tone row). */
+  readonly effectiveDark = computed(
+    () => this.theme() === 'dark' || (this.theme() === 'system' && this.systemDark()),
+  );
+  private readonly systemDark = signal(window.matchMedia('(prefers-color-scheme: dark)').matches);
+
   constructor() {
+    window
+      .matchMedia('(prefers-color-scheme: dark)')
+      .addEventListener('change', (e) => this.systemDark.set(e.matches));
     // the default accent is not the CSS default — apply before first paint
     this.applyAccent();
     if (!this.rpc.available) return;
     void this.rpc.request.getSettings({}).then((res) => {
       if (!res.ok) return;
       this.theme.set(res.settings.theme);
+      this.darkTone.set(res.settings.darkTone);
       this.accent.set(res.settings.accent);
       this.iconColors.set(res.settings.iconColors);
       this.speedUnit.set(res.settings.speedUnit);
@@ -34,6 +45,7 @@ export class SettingsService {
       this.editor.set(res.settings.editor);
       this.editorApp.set(res.settings.editorApp);
       this.applyTheme();
+      this.applyDarkTone();
       this.applyAccent();
       this.applyTextSize();
     });
@@ -45,6 +57,12 @@ export class SettingsService {
     void this.persist();
   }
 
+  setDarkTone(tone: AppSettings['darkTone']): void {
+    this.darkTone.set(tone);
+    this.applyDarkTone();
+    void this.persist();
+  }
+
   setAccent(tone: AppSettings['accent']): void {
     this.accent.set(tone);
     this.applyAccent();
@@ -102,6 +120,15 @@ export class SettingsService {
     }
   }
 
+  private applyDarkTone(): void {
+    const tone = this.darkTone();
+    if (tone === 'dark') {
+      delete document.documentElement.dataset['darkTone'];
+    } else {
+      document.documentElement.dataset['darkTone'] = tone;
+    }
+  }
+
   private applyAccent(): void {
     const tone = this.accent();
     if (tone === 'graphite') {
@@ -123,6 +150,7 @@ export class SettingsService {
   protected settings(): AppSettings {
     return {
       theme: this.theme(),
+      darkTone: this.darkTone(),
       accent: this.accent(),
       iconColors: this.iconColors(),
       speedUnit: this.speedUnit(),
diff --git a/ui/src/app/tab-bar/tab-bar.ts b/ui/src/app/tab-bar/tab-bar.ts
index d0b77ba..b772ffd 100644
--- a/ui/src/app/tab-bar/tab-bar.ts
+++ b/ui/src/app/tab-bar/tab-bar.ts
@@ -7,6 +7,7 @@ import { RpcService } from '../rpc.service';
 import { SettingsService } from '../settings.service';
 
 const THEMES = ['system', 'light', 'dark'] as const;
+const DARK_TONES = ['dark', 'darker'] as const;
 // Swatch colors are fixed mid-tones so every dot reads on both light and dark
 // cards (the live --primary values would vanish against one of them).
 const ACCENTS: readonly { value: AccentTone; swatch: string; label: string }[] = [
@@ -133,6 +134,25 @@ const CONCURRENCY_CHOICES = [2, 3, 4, 6, 8] as const;
             </div>
           </div>
 
+          @if (settings.effectiveDark()) {
+            <div class="mt-2.5 flex items-center justify-between gap-2">
+              <span class="text-xs text-muted-foreground">Tone</span>
+              <div class="flex rounded-md border border-border p-0.5">
+                @for (tone of darkTones; track tone) {
+                  <button
+                    (click)="settings.setDarkTone(tone)"
+                    class="rounded px-2 py-0.5 text-[11px] capitalize"
+                    [class.bg-accent]="settings.darkTone() === tone"
+                    [class.text-foreground]="settings.darkTone() === tone"
+                    [class.text-muted-foreground]="settings.darkTone() !== tone"
+                  >
+                    {{ tone }}
+                  </button>
+                }
+              </div>
+            </div>
+          }
+
           <div class="mt-2.5 flex items-center justify-between gap-2">
             <span class="text-xs text-muted-foreground">Accent</span>
             <div class="flex items-center gap-1.5">
@@ -322,6 +342,7 @@ export class TabBar {
   readonly settingsOpen = signal(false);
   readonly isMacChrome = IS_MAC_CHROME;
   readonly themes = THEMES;
+  readonly darkTones = DARK_TONES;
   readonly accents = ACCENTS;
   readonly iconColorModes = ICON_COLOR_MODES;
   readonly speedUnits = SPEED_UNITS;
diff --git a/ui/src/styles.css b/ui/src/styles.css
index 541eb66..5723f10 100644
--- a/ui/src/styles.css
+++ b/ui/src/styles.css
@@ -41,23 +41,23 @@
 
 :root[data-theme='dark'] {
   color-scheme: dark;
-  --background: oklch(0.141 0.005 285.823);
+  --background: oklch(0.27 0.006 286.03);
   --foreground: oklch(0.985 0 0);
-  --card: oklch(0.21 0.006 285.885);
+  --card: oklch(0.315 0.007 286.05);
   --card-foreground: oklch(0.985 0 0);
   --primary: oklch(0.92 0.004 286.32);
   --primary-foreground: oklch(0.21 0.006 285.885);
-  --secondary: oklch(0.274 0.006 286.033);
+  --secondary: oklch(0.37 0.013 285.805);
   --secondary-foreground: oklch(0.985 0 0);
-  --muted: oklch(0.274 0.006 286.033);
-  --muted-foreground: oklch(0.705 0.015 286.067);
-  --accent: oklch(0.274 0.006 286.033);
+  --muted: oklch(0.37 0.013 285.805);
+  --muted-foreground: oklch(0.74 0.015 286.07);
+  --accent: oklch(0.37 0.013 285.805);
   --accent-foreground: oklch(0.985 0 0);
   --destructive: oklch(0.704 0.191 22.216);
   --destructive-foreground: oklch(0.985 0 0);
   --success: oklch(0.696 0.17 149.2);
-  --border: oklch(1 0 0 / 12%);
-  --input: oklch(1 0 0 / 15%);
+  --border: oklch(1 0 0 / 14%);
+  --input: oklch(1 0 0 / 18%);
   --ring: oklch(0.552 0.016 285.938);
   --icon-folder: oklch(0.75 0.11 250);
   --icon-link: oklch(0.74 0.09 190);
@@ -69,23 +69,23 @@
 
 @media (prefers-color-scheme: dark) {
   :root:not([data-theme='light']) {
-    --background: oklch(0.141 0.005 285.823);
+    --background: oklch(0.27 0.006 286.03);
     --foreground: oklch(0.985 0 0);
-    --card: oklch(0.21 0.006 285.885);
+    --card: oklch(0.315 0.007 286.05);
     --card-foreground: oklch(0.985 0 0);
     --primary: oklch(0.92 0.004 286.32);
     --primary-foreground: oklch(0.21 0.006 285.885);
-    --secondary: oklch(0.274 0.006 286.033);
+    --secondary: oklch(0.37 0.013 285.805);
     --secondary-foreground: oklch(0.985 0 0);
-    --muted: oklch(0.274 0.006 286.033);
-    --muted-foreground: oklch(0.705 0.015 286.067);
-    --accent: oklch(0.274 0.006 286.033);
+    --muted: oklch(0.37 0.013 285.805);
+    --muted-foreground: oklch(0.74 0.015 286.07);
+    --accent: oklch(0.37 0.013 285.805);
     --accent-foreground: oklch(0.985 0 0);
     --destructive: oklch(0.704 0.191 22.216);
     --destructive-foreground: oklch(0.985 0 0);
     --success: oklch(0.696 0.17 149.2);
-    --border: oklch(1 0 0 / 12%);
-    --input: oklch(1 0 0 / 15%);
+    --border: oklch(1 0 0 / 14%);
+    --input: oklch(1 0 0 / 18%);
     --ring: oklch(0.552 0.016 285.938);
     --icon-folder: oklch(0.75 0.11 250);
     --icon-link: oklch(0.74 0.09 190);
@@ -96,6 +96,32 @@
   }
 }
 
+/* Dark tone "darker" (data-dark-tone set by SettingsService; absent = grey "dark").
+   Near-black AMOLED palette. Duplicated for forced-dark and system-dark like the
+   token blocks above — the extra attribute outranks them. */
+:root[data-theme='dark'][data-dark-tone='darker'] {
+  --background: oklch(0.141 0.005 285.823);
+  --card: oklch(0.21 0.006 285.885);
+  --secondary: oklch(0.274 0.006 286.033);
+  --muted: oklch(0.274 0.006 286.033);
+  --muted-foreground: oklch(0.705 0.015 286.067);
+  --accent: oklch(0.274 0.006 286.033);
+  --border: oklch(1 0 0 / 12%);
+  --input: oklch(1 0 0 / 15%);
+}
+@media (prefers-color-scheme: dark) {
+  :root:not([data-theme='light'])[data-dark-tone='darker'] {
+    --background: oklch(0.141 0.005 285.823);
+    --card: oklch(0.21 0.006 285.885);
+    --secondary: oklch(0.274 0.006 286.033);
+    --muted: oklch(0.274 0.006 286.033);
+    --muted-foreground: oklch(0.705 0.015 286.067);
+    --accent: oklch(0.274 0.006 286.033);
+    --border: oklch(1 0 0 / 12%);
+    --input: oklch(1 0 0 / 15%);
+  }
+}
+
 @theme inline {
   --color-background: var(--background);
   --color-foreground: var(--foreground);