diff --git a/e2e-tests/home.spec.ts b/e2e-tests/home.spec.ts
index f6edafc..6fa9627 100644
--- a/e2e-tests/home.spec.ts
+++ b/e2e-tests/home.spec.ts
@@ -24,4 +24,20 @@ test.describe('Home Page', () => {
     // Check that the welcome message is present using more specific locator
     await expect(page.getByText('Find your next game! And maybe even back one! Explore our collection!')).toBeVisible();
   });
+
+  test('should toggle high contrast mode and persist preference', async ({ page }) => {
+    const contrastToggle = page.getByTestId('contrast-toggle');
+
+    await expect(contrastToggle).toHaveAttribute('aria-pressed', 'false');
+
+    await contrastToggle.click();
+
+    await expect(contrastToggle).toHaveAttribute('aria-pressed', 'true');
+    await expect(page.locator('html')).toHaveClass(/high-contrast/);
+
+    await page.reload();
+
+    await expect(page.locator('html')).toHaveClass(/high-contrast/);
+    await expect(page.getByTestId('contrast-toggle')).toHaveAttribute('aria-pressed', 'true');
+  });
 });
diff --git a/src/components/Header.astro b/src/components/Header.astro
index 9969e6a..34321fd 100644
--- a/src/components/Header.astro
+++ b/src/components/Header.astro
@@ -2,11 +2,11 @@
 import Menu from '../assets/icons/menu.svg';
 ---
 
-<header class="bg-blue-500 dark:bg-blue-700 text-white p-4 shadow-md transition-colors duration-300">
+<header class="bg-blue-700 text-white p-4 shadow-md transition-colors duration-300">
   <div class="container mx-auto flex justify-between items-center pl-4 pr-4">
     <div class="flex items-center">
       <div class="relative group">
-        <button id="menu-toggle" class="focus:outline-none focus:ring-2 focus:ring-white focus:ring-offset-2 focus:ring-offset-blue-500 rounded mr-4" aria-label="Toggle menu" aria-expanded="false" aria-controls="menu">
+        <button id="menu-toggle" class="focus:outline-none focus:ring-2 focus:ring-white focus:ring-offset-2 focus:ring-offset-blue-700 rounded mr-4" aria-label="Toggle menu" aria-expanded="false" aria-controls="menu" data-testid="menu-toggle">
           <Menu class="h-6 w-6" aria-hidden="true" />
         </button>
         <nav id="menu" aria-label="Main" class="hidden absolute left-0 mt-2 w-48 bg-white dark:bg-slate-800 text-slate-800 dark:text-white rounded shadow-lg z-10 transition-colors duration-300">
@@ -18,10 +18,63 @@ import Menu from '../assets/icons/menu.svg';
       </div>
       <div class="text-xl font-bold"><a href="/" class="hover:underline">Tailspin Toys</a></div>
     </div>
+    <button
+      id="contrast-toggle"
+      type="button"
+      class="rounded border border-white px-3 py-2 text-sm font-medium hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-white focus:ring-offset-2 focus:ring-offset-blue-700"
+      aria-label="Enable high contrast mode"
+      aria-pressed="false"
+      data-testid="contrast-toggle"
+    >
+      <span id="contrast-toggle-label">High Contrast: Off</span>
+    </button>
   </div>
 </header>
 
 <script>
+  const HIGH_CONTRAST_STORAGE_KEY = 'tailspin-high-contrast';
+  const contrastToggle = document.getElementById('contrast-toggle');
+  const contrastToggleLabel = document.getElementById('contrast-toggle-label');
+
+  const setHighContrastState = (enabled: boolean) => {
+    document.documentElement.classList.toggle('high-contrast', enabled);
+
+    if (contrastToggle) {
+      contrastToggle.setAttribute('aria-pressed', String(enabled));
+      contrastToggle.setAttribute(
+        'aria-label',
+        enabled ? 'Disable high contrast mode' : 'Enable high contrast mode',
+      );
+    }
+
+    if (contrastToggleLabel) {
+      contrastToggleLabel.textContent = enabled ? 'High Contrast: On' : 'High Contrast: Off';
+    }
+  };
+
+  const getStoredHighContrastPreference = () => {
+    try {
+      return window.localStorage.getItem(HIGH_CONTRAST_STORAGE_KEY) === 'true';
+    } catch {
+      return false;
+    }
+  };
+
+  if (contrastToggle) {
+    setHighContrastState(getStoredHighContrastPreference());
+
+    contrastToggle.addEventListener('click', () => {
+      const isEnabled = !document.documentElement.classList.contains('high-contrast');
+      setHighContrastState(isEnabled);
+
+      try {
+        window.localStorage.setItem(HIGH_CONTRAST_STORAGE_KEY, String(isEnabled));
+      } catch {
+        // Ignore storage access errors.
+      }
+    });
+  }
+
   // Toggle menu visibility when hamburger is clicked
   const menuToggle = document.getElementById('menu-toggle');
   const menu = document.getElementById('menu');
diff --git a/src/layouts/Layout.astro b/src/layouts/Layout.astro
index 1ec4c73..af609c3 100644
--- a/src/layouts/Layout.astro
+++ b/src/layouts/Layout.astro
@@ -17,6 +17,15 @@ const { title = "Tailspin Toys" } = Astro.props;
         <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
         <meta name="generator" content={Astro.generator} />
         <title>{title}</title>
+        <script is:inline>
+            try {
+                if (window.localStorage.getItem('tailspin-high-contrast') === 'true') {
+                    document.documentElement.classList.add('high-contrast');
+                }
+            } catch {
+                // Ignore storage access errors.
+            }
+        </script>
         <!-- Preconnect to improve font loading -->
         <link rel="preconnect" href="https://fonts.googleapis.com" />
         <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
diff --git a/src/styles/global.css b/src/styles/global.css
index f1d8c73..8a8768d 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -1 +1,49 @@
 @import "tailwindcss";
+
+html.high-contrast {
+  color-scheme: dark;
+}
+
+html.high-contrast body,
+html.high-contrast .bg-white,
+html.high-contrast .bg-slate-100,
+html.high-contrast .bg-slate-700,
+html.high-contrast .bg-slate-800,
+html.high-contrast .bg-slate-900,
+html.high-contrast .bg-blue-500,
+html.high-contrast .bg-blue-600,
+html.high-contrast .bg-blue-700,
+html.high-contrast .bg-blue-900,
+html.high-contrast .bg-purple-900,
+html.high-contrast .dark\:bg-slate-700,
+html.high-contrast .dark\:bg-slate-800,
+html.high-contrast .dark\:bg-blue-700 {
+  background-color: #000 !important;
+}
+
+html.high-contrast,
+html.high-contrast .text-slate-100,
+html.high-contrast .text-slate-200,
+html.high-contrast .text-slate-300,
+html.high-contrast .text-slate-400,
+html.high-contrast .text-slate-800,
+html.high-contrast .text-white,
+html.high-contrast .text-blue-300,
+html.high-contrast .text-blue-400,
+html.high-contrast .text-purple-300,
+html.high-contrast .text-yellow-400,
+html.high-contrast .dark\:text-white {
+  color: #fff !important;
+}
+
+html.high-contrast a {
+  color: #ff0 !important;
+  text-decoration: underline;
+}
+
+html.high-contrast button,
+html.high-contrast .border-slate-600,
+html.high-contrast .border-slate-700,
+html.high-contrast .border-blue-500 {
+  border-color: #fff !important;
+}