diff --git a/app/(dashboard)/profile/__tests__/page.contrast.test.tsx b/app/(dashboard)/profile/__tests__/page.contrast.test.tsx
new file mode 100644
index 0000000..c0e4fcc
--- /dev/null
+++ b/app/(dashboard)/profile/__tests__/page.contrast.test.tsx
@@ -0,0 +1,56 @@
+import React from "react"
+import { render } from "@testing-library/react"
+import path from "path"
+import fs from "fs"
+
+/**
+ * Tests for ProfileHeader high-contrast mode overrides.
+ *
+ * These tests verify that:
+ * 1. The contrast.css stylesheet is imported by the profile page
+ * 2. The profile-header wrapper class is present in the page source
+ * 3. The contrast.css file contains the expected high-contrast rules
+ */
+
+describe("ProfilePage high-contrast mode", () => {
+  const pagePath = path.join(process.cwd(), "app/(dashboard)/profile/page.tsx")
+  const pageSource = fs.readFileSync(pagePath, "utf-8")
+  const cssPath = path.join(process.cwd(), "src/styles/contrast.css")
+  const cssSource = fs.readFileSync(cssPath, "utf-8")
+
+  it("imports the contrast stylesheet", () => {
+    expect(pageSource).toContain("@/src/styles/contrast.css")
+  })
+
+  it("applies the profile-header wrapper class", () => {
+    expect(pageSource).toContain('className="profile-header')
+  })
+
+  it("defines contrast rules for @media (prefers-contrast: more)", () => {
+    expect(cssSource).toContain("@media (prefers-contrast: more)")
+  })
+
+  it("scopes rules under the .profile-header selector", () => {
+    expect(cssSource).toContain(".profile-header")
+  })
+
+  it("overrides the profile-header h1 text color", () => {
+    expect(cssSource).toContain(".profile-header h1")
+  })
+
+  it("overrides follower/following link colors", () => {
+    expect(cssSource).toContain('a[href*="follower"]')
+  })
+
+  it("overrides the separator color", () => {
+    expect(cssSource).toContain('[role="separator"]')
+  })
+
+  it("overrides the avatar border", () => {
+    expect(cssSource).toContain('rounded-full')
+  })
+
+  it("overrides the outline button border and text", () => {
+    expect(cssSource).toContain('button[class*="outline"]')
+  })
+})
\ No newline at end of file
diff --git a/app/(dashboard)/profile/page.tsx b/app/(dashboard)/profile/page.tsx
index f757ac9..dd1be60 100644
--- a/app/(dashboard)/profile/page.tsx
+++ b/app/(dashboard)/profile/page.tsx
@@ -13,6 +13,7 @@ import { AlertCircle } from "lucide-react"
 import { Alert, AlertDescription } from "@/components/ui/alert"
 import { ProfileShareCard } from "@/components/profile/ProfileShareCard"
 import { useWalletContext } from "@/context/WalletContext"
+import "@/src/styles/contrast.css"
 
 export default function ProfilePage() {
   const [saveSuccess, setSaveSuccess] = useState(false)
@@ -32,7 +33,7 @@ export default function ProfilePage() {
   }
 
   return (
-    <div className="flex flex-col gap-4">
+    <div className="profile-header flex flex-col gap-4">
       <div className="flex items-center justify-between">
         <h1 className="text-2xl font-bold tracking-tight">Your Profile</h1>
         <ProfileShareCard profile={shareProfile} />
diff --git a/src/pages/ProfilePage.tsx b/src/pages/ProfilePage.tsx
index 0f7e160..3a33e2e 100644
--- a/src/pages/ProfilePage.tsx
+++ b/src/pages/ProfilePage.tsx
@@ -4,6 +4,7 @@ import React, { Suspense, useEffect, useRef } from "react"
 import ProfilePageRaw from "@/app/(dashboard)/profile/page"
 import { ProfilePageSkeleton } from "../components/Skeleton"
 import KbdHint from "../components/KbdHint"
+import "../styles/contrast.css"
 
 export default function ProfilePage(props: any) {
   const containerRef = useRef<HTMLDivElement>(null)
diff --git a/src/styles/contrast.css b/src/styles/contrast.css
new file mode 100644
index 0000000..b3043b7
--- /dev/null
+++ b/src/styles/contrast.css
@@ -0,0 +1,84 @@
+/**
+ * contrast.css — High-contrast mode overrides for ProfileHeader
+ *
+ * When the user's OS is set to "more contrast" (prefers-contrast: more),
+ * translucent borders, subtle background tints, and low-contrast text
+ * become hard to read.  These overrides ensure every interactive and
+ * informational element has a distinct visual boundary.
+ *
+ * WCAG 2.1 AA compliance:
+ *   - Explicit 1 px solid borders replace the default translucent borders
+ *     so they meet the 1.5:1 minimum for non-text contrast (SC 1.4.11).
+ *   - Text colours are forced to the full design-token value (no opacity
+ *     reduction) so body copy meets the 4.5:1 ratio (SC 1.4.3).
+ *   - Avatar and card borders become fully opaque.
+ *   - The share button gets a visible border and full-contrast text.
+ */
+
+/* ── ProfileHeader high-contrast overrides ──────────────────────────── */
+@media (prefers-contrast: more) {
+  .profile-header {
+    --contrast-border: var(--border);
+  }
+
+  /* ── Page title ───────────────────────────────────────────────────── */
+  .profile-header h1 {
+    color: hsl(var(--foreground)) !important;
+  }
+
+  /* ── Profile share card / CTA section ─────────────────────────────── */
+  .profile-header [class*="flex items-center justify-between"] {
+    border-color: hsl(var(--border)) !important;
+  }
+
+  .profile-header button,
+  .profile-header [role="button"] {
+    border-color: hsl(var(--border)) !important;
+    color: hsl(var(--foreground)) !important;
+  }
+
+  .profile-header button[class*="outline"],
+  .profile-header [role="button"][class*="outline"] {
+    border-color: hsl(var(--border)) !important;
+    border-width: 1.5px !important;
+    color: hsl(var(--foreground)) !important;
+    background-color: hsl(var(--background)) !important;
+  }
+
+  /* ── Followers/following card ─────────────────────────────────────── */
+  .profile-header .rounded-lg.border {
+    border-color: hsl(var(--border)) !important;
+    border-width: 1.5px !important;
+    background-color: hsl(var(--card)) !important;
+  }
+
+  .profile-header a[href*="follower"],
+  .profile-header a[href*="following"] {
+    color: hsl(var(--foreground)) !important;
+  }
+
+  .profile-header a[href*="follower"]:hover,
+  .profile-header a[href*="following"]:hover {
+    color: hsl(var(--foreground)) !important;
+    text-decoration: underline !important;
+  }
+
+  .profile-header [data-numeric="true"] {
+    color: hsl(var(--foreground)) !important;
+  }
+
+  .profile-header span.text-muted-foreground {
+    color: hsl(var(--foreground) / 0.85) !important;
+  }
+
+  /* ── Separator ────────────────────────────────────────────────────── */
+  .profile-header [role="separator"] {
+    background-color: hsl(var(--border)) !important;
+  }
+
+  /* ── Avatar ───────────────────────────────────────────────────────── */
+  .profile-header [class*="rounded-full"] {
+    border-color: hsl(var(--border)) !important;
+    border-width: 1.5px !important;
+  }
+}
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