diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f0b1e7..5fa5749 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,9 +6,15 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   verify:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
 
     steps:
       - name: Checkout Code
@@ -36,6 +42,7 @@ jobs:
 
       - name: Upload Coverage to Codecov
         uses: codecov/codecov-action@v6
+        if: matrix.os == 'ubuntu-latest'
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true
diff --git a/README.md b/README.md
index 8a77f40..c06afe8 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,15 @@ npm install -g doro-cli
 
 Once installed, just run `doro` in your terminal!
 
+### Windows
+
+```powershell
+npm.cmd install -g doro-cli
+doro.cmd
+```
+
+Use the `.cmd` launchers in PowerShell to avoid script execution policy restrictions.
+
 ## Quick Start (Build from source)
 
 ```bash
diff --git a/src/__tests__/ui.test.ts b/src/__tests__/ui.test.ts
index d238a90..1e09124 100644
--- a/src/__tests__/ui.test.ts
+++ b/src/__tests__/ui.test.ts
@@ -21,7 +21,7 @@ vi.mock('blessed', () => {
   return {
     default: {
       screen: vi.fn(() => mockScreen),
-      box: vi.fn(() => ({ ...mockBox }))
+      box: vi.fn((options) => ({ ...mockBox, style: { ...options.style } }))
     }
   };
 });
@@ -74,6 +74,109 @@ describe('DoroUi', () => {
     expect(handlers.onAnyClick).toHaveBeenCalledTimes(1);
   });
 
+  it('should use an ANSI-safe magenta palette on Windows', () => {
+    const originalPlatform = process.platform;
+    Object.defineProperty(process, 'platform', { value: 'win32' });
+
+    try {
+      ui = new DoroUi(handlers as any);
+      expect(vi.mocked(blessed.box).mock.calls[0][0]).toMatchObject({
+        style: { bg: 'magenta' }
+      });
+      expect(vi.mocked(blessed.box).mock.calls[1][0]).toMatchObject({
+        style: { bg: 'brightmagenta' }
+      });
+      expect(vi.mocked(blessed.box).mock.calls[2][0]).toMatchObject({
+        style: { bg: 'default', fg: 'default' }
+      });
+    } finally {
+      ui?.destroy();
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    }
+  });
+
+  it('should use an ANSI-safe yellow palette for calm mode on Windows', () => {
+    const originalPlatform = process.platform;
+    Object.defineProperty(process, 'platform', { value: 'win32' });
+
+    try {
+      ui = new DoroUi(handlers as any, 'calm');
+      expect(vi.mocked(blessed.box).mock.calls[0][0]).toMatchObject({
+        style: { bg: 'yellow' }
+      });
+      expect(vi.mocked(blessed.box).mock.calls[1][0]).toMatchObject({
+        style: { bg: 'brightyellow' }
+      });
+    } finally {
+      ui?.destroy();
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    }
+  });
+
+  it('should use distinct ANSI colors for Windows short and long breaks', () => {
+    const originalPlatform = process.platform;
+    Object.defineProperty(process, 'platform', { value: 'win32' });
+
+    try {
+      ui = new DoroUi(handlers as any);
+      const root = vi.mocked(blessed.box).mock.results[0].value;
+      const progressFill = vi.mocked(blessed.box).mock.results[1].value;
+      const banner = vi.mocked(blessed.box).mock.results[2].value;
+      const baseState = {
+        status: 'running' as const,
+        remainingSeconds: 600,
+        durationSeconds: 1500,
+        isLocked: false,
+        volumeMode: 'normal' as const,
+        hasPrompt: false,
+        promptCountdownSeconds: 0,
+        promptTotalSeconds: 0,
+        promptNextMode: null,
+        updatePromptState: 'none' as const,
+        updateCheckResult: null,
+        editDurationState: 'none' as const,
+        editDurationValue: null,
+        editDurationBlink: false
+      };
+
+      ui.render({ ...baseState, mode: 'short' });
+      expect(root.style.bg).toBe('cyan');
+      expect(progressFill.style.bg).toBe('brightcyan');
+      expect(banner.setContent).toHaveBeenCalledWith(expect.stringContaining('{bright-cyan-bg}'));
+
+      ui.render({ ...baseState, mode: 'long' });
+      expect(root.style.bg).toBe('blue');
+      expect(progressFill.style.bg).toBe('brightblue');
+      expect(banner.setContent).toHaveBeenLastCalledWith(
+        expect.stringContaining('{bright-blue-bg}')
+      );
+
+      ui.destroy();
+      const previousBoxCount = vi.mocked(blessed.box).mock.results.length;
+      ui = new DoroUi(handlers as any, 'calm');
+      const calmBoxes = vi
+        .mocked(blessed.box)
+        .mock.results.slice(previousBoxCount, previousBoxCount + 3);
+      const calmRoot = calmBoxes[0].value;
+      const calmProgressFill = calmBoxes[1].value;
+      const calmBanner = calmBoxes[2].value;
+
+      ui.render({ ...baseState, mode: 'short' });
+      expect(calmRoot.style.bg).toBe('green');
+      expect(calmProgressFill.style.bg).toBe('brightgreen');
+
+      ui.render({ ...baseState, mode: 'long' });
+      expect(calmRoot.style.bg).toBe('cyan');
+      expect(calmProgressFill.style.bg).toBe('brightcyan');
+      expect(calmBanner.setContent).toHaveBeenLastCalledWith(
+        expect.stringContaining('{bright-cyan-bg}')
+      );
+    } finally {
+      ui?.destroy();
+      Object.defineProperty(process, 'platform', { value: originalPlatform });
+    }
+  });
+
   it('should render work mode state', () => {
     ui = new DoroUi(handlers as any);
     const mockScreen = vi.mocked(blessed.screen).mock.results[0].value;
diff --git a/src/__tests__/update.test.ts b/src/__tests__/update.test.ts
index 38f0b15..ba4e12f 100644
--- a/src/__tests__/update.test.ts
+++ b/src/__tests__/update.test.ts
@@ -216,8 +216,23 @@ describe('update functionality', () => {
   });
 
   describe('getUpdateCommand', () => {
-    it('should return npm install command', () => {
-      expect(getUpdateCommand()).toBe('npm install -g doro-cli@latest && doro');
+    it('should return a shell-compatible update command', () => {
+      expect(getUpdateCommand()).toBe(
+        process.platform === 'win32'
+          ? 'npm.cmd install -g doro-cli@latest; if ($?) { doro.cmd }'
+          : 'npm install -g doro-cli@latest && doro'
+      );
+    });
+
+    it('should return a PowerShell-compatible command on Windows', () => {
+      const originalPlatform = process.platform;
+      Object.defineProperty(process, 'platform', { value: 'win32' });
+
+      try {
+        expect(getUpdateCommand()).toBe('npm.cmd install -g doro-cli@latest; if ($?) { doro.cmd }');
+      } finally {
+        Object.defineProperty(process, 'platform', { value: originalPlatform });
+      }
     });
   });
 
@@ -440,6 +455,7 @@ describe('update functionality', () => {
       const result = await resultPromise;
 
       expect(result.success).toBe(true);
+      expect(result.command).toBe('npm.cmd install -g doro-cli@latest; if ($?) { doro.cmd }');
       expect(mockSpawnLocal).toHaveBeenCalledWith('clip', []);
 
       Object.defineProperty(process, 'platform', { value: originalPlatform });
diff --git a/src/ui.ts b/src/ui.ts
index c02db5a..533ae4e 100644
--- a/src/ui.ts
+++ b/src/ui.ts
@@ -1,6 +1,7 @@
 import blessed from 'blessed';
 import { MODE_LABELS, MODE_LABELS_SHORT, type TimerMode, type TimerStatus } from './constants';
 import { enableMouse, disableMouse } from './mouse';
+import { getUpdateCommand } from './update';
 import type { UpdateCheckResult, UpdatePromptState } from './update';
 
 type UiRenderState = {
@@ -79,6 +80,10 @@ export function splitAtVisible(s: string, n: number): [string, string] {
   return [s, ''];
 }
 
+function colorTagName(color: string): string {
+  return color.replace(/^(bright|light)(?=[a-z])/, '$1-');
+}
+
 // Wide format: [key, remaining letters] pairs — key rendered in bold, rest appended.
 // Lock uses uppercase 'L' and Update uses uppercase 'U' to distinguish them from 'l'/'u'.
 const HELP_KEYS_WIDE: [string, string][] = [
@@ -236,19 +241,28 @@ function getUpdatePromptText(
   }
 
   if (updatePromptState === 'copyFallback') {
-    const candidates = [
-      'Run this command after doro exits: npm install -g doro-cli@latest && doro',
-      'Run after exit: npm install -g doro-cli@latest && doro',
-      'Run: npm install -g doro-cli@latest && doro',
-      'Run: npm i -g doro-cli@latest && doro',
-      'npm i -g doro-cli@latest && doro'
-    ];
+    const updateCommand = getUpdateCommand();
+    const candidates =
+      process.platform === 'win32'
+        ? [
+            `Run this command after doro exits: ${updateCommand}`,
+            `Run after exit: ${updateCommand}`,
+            `Run: ${updateCommand}`,
+            updateCommand
+          ]
+        : [
+            'Run this command after doro exits: npm install -g doro-cli@latest && doro',
+            'Run after exit: npm install -g doro-cli@latest && doro',
+            'Run: npm install -g doro-cli@latest && doro',
+            'Run: npm i -g doro-cli@latest && doro',
+            'npm i -g doro-cli@latest && doro'
+          ];
     for (const c of candidates) {
       if (c.length <= cols) {
         return c;
       }
     }
-    return 'npm i -g doro-cli@latest && doro';
+    return updateCommand;
   }
 
   if (updatePromptState === 'skipped') {
@@ -349,12 +363,15 @@ function buildProgressRow(
 
   const bO = bold ? '{bold}' : '';
   const bC = bold ? '{/bold}' : '';
+  const fillTag = colorTagName(fillBg);
+  const baseTag = colorTagName(baseBg);
+  const fgTag = colorTagName(fg);
   let content = '';
   if (p1.length > 0) {
-    content += `{${fillBg}-bg}{${fg}-fg}${bO}${p1}${bC}`;
+    content += `{${fillTag}-bg}{${fgTag}-fg}${bO}${p1}${bC}`;
   }
   if (p2.length > 0) {
-    content += `{${baseBg}-bg}{${fg}-fg}${bO}${p2}${bC}`;
+    content += `{${baseTag}-bg}{${fgTag}-fg}${bO}${p2}${bC}`;
   }
   return content;
 }
@@ -454,6 +471,40 @@ const PALETTES: Record<ColorScheme, Palette> = {
   }
 };
 
+function createWindowsModeStyle(base: string, fill: string): ModeStyle {
+  return {
+    base,
+    fill,
+    text: 'default',
+    bannerBg: 'default',
+    bannerFg: 'default',
+    statusBg: 'default',
+    statusFg: 'default',
+    promptBg: 'default',
+    promptFg: 'default'
+  };
+}
+
+const WINDOWS_PAUSED_STYLE = createWindowsModeStyle('default', 'brightblack');
+const WINDOWS_PALETTES: Record<ColorScheme, Palette> = {
+  modern: {
+    modes: {
+      work: createWindowsModeStyle('magenta', 'brightmagenta'),
+      short: createWindowsModeStyle('cyan', 'brightcyan'),
+      long: createWindowsModeStyle('blue', 'brightblue')
+    },
+    pause: WINDOWS_PAUSED_STYLE
+  },
+  calm: {
+    modes: {
+      work: createWindowsModeStyle('yellow', 'brightyellow'),
+      short: createWindowsModeStyle('green', 'brightgreen'),
+      long: createWindowsModeStyle('cyan', 'brightcyan')
+    },
+    pause: WINDOWS_PAUSED_STYLE
+  }
+};
+
 function clamp(value: number, min: number, max: number): number {
   return Math.max(min, Math.min(max, value));
 }
@@ -506,7 +557,8 @@ export class DoroUi {
 
   public constructor(handlers: UiHandlers, initialColorScheme: ColorScheme = 'modern') {
     this.colorScheme = initialColorScheme;
-    const initialStyle = PALETTES[this.colorScheme].modes.work;
+    const palettes = process.platform === 'win32' ? WINDOWS_PALETTES : PALETTES;
+    const initialStyle = palettes[this.colorScheme].modes.work;
 
     this.screen = blessed.screen({
       smartCSR: false,
@@ -644,7 +696,7 @@ export class DoroUi {
     const cols = this.screen.cols;
     const rows = this.screen.rows;
     const isPaused = state.status === 'paused';
-    const palette = PALETTES[this.colorScheme];
+    const palette = (process.platform === 'win32' ? WINDOWS_PALETTES : PALETTES)[this.colorScheme];
     const isTransition = state.hasPrompt;
     const hasUpdatePrompt = state.updatePromptState !== 'none';
     const isEditingDuration = state.editDurationState === 'editing';
diff --git a/src/update.ts b/src/update.ts
index 0b56385..d8acb7c 100644
--- a/src/update.ts
+++ b/src/update.ts
@@ -141,6 +141,10 @@ export async function checkForUpdates(): Promise<UpdateCheckResult> {
  * Gets the update command for the current platform
  */
 export function getUpdateCommand(): string {
+  if (process.platform === 'win32') {
+    return 'npm.cmd install -g doro-cli@latest; if ($?) { doro.cmd }';
+  }
+
   return 'npm install -g doro-cli@latest && doro';
 }
 
diff --git a/tests/snapshots/visual.spec.mts-snapshots/calm-tiny-update-copy-fallback-chromium-linux.png b/tests/snapshots/visual.spec.mts-snapshots/calm-tiny-update-copy-fallback-chromium-linux.png
index b389b26..7cafa71 100644
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diff --git a/tests/snapshots/visual.spec.mts-snapshots/calm-ultra-small-update-copy-fallback-chromium-linux.png b/tests/snapshots/visual.spec.mts-snapshots/calm-ultra-small-update-copy-fallback-chromium-linux.png
index a3d2443..76817d5 100644
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diff --git a/tests/snapshots/visual.spec.mts-snapshots/modern-tiny-update-copy-fallback-chromium-linux.png b/tests/snapshots/visual.spec.mts-snapshots/modern-tiny-update-copy-fallback-chromium-linux.png
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diff --git a/tests/snapshots/visual.spec.mts-snapshots/modern-ultra-small-update-copy-fallback-chromium-linux.png b/tests/snapshots/visual.spec.mts-snapshots/modern-ultra-small-update-copy-fallback-chromium-linux.png
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