diff --git a/EXHAUSTIVE_TODO_LIST.md b/EXHAUSTIVE_TODO_LIST.md
index 7b47629e7..04b1dff80 100644
--- a/EXHAUSTIVE_TODO_LIST.md
+++ b/EXHAUSTIVE_TODO_LIST.md
@@ -3936,9 +3936,12 @@ Critical path dependencies:
       - Settings modals: DataExportView, ChangeEmailModal, PasskeyModal decorative icon backgrounds (3 instances)
       - DashboardPage: chart bars and tooltip (decorative visualization, 2 instances)
       - TwoFactorSetup: decorative icon background (1 instance)
-    - **Preserved**: Active/selected states (StudioView active tab, AccountSettings selected theme, SessionManagement current session, DashboardPage selected button, TrackList current track indicator, IntegrationsView connected state), primary actions, informational alerts
+    - ✅ **Third batch** (~4 files, ~4 instances):
+      - Layout components: Sidebar hub header icon, AutoMetadataDetectionModal modal border, CourseDetailView card border (3 instances)
+      - Note: Header.tsx decorative icon (line 76) identified but not replaced yet (to be handled in next batch)
+    - **Preserved**: Active/selected states (StudioView active tab, AccountSettings selected theme, SessionManagement current session, DashboardPage selected button, TrackList current track indicator, IntegrationsView connected state, Header active notification, AudioPlayer dragged item, VisualizerSettingsModal selected mode, CreateProjectModal selected DAW, AIToolsView active tool, CourseLearningView active lesson, TipStreamerModal selected payment, CloudFileBrowser active tag, PlaylistDetailView dragged item, AddToPlaylistModal selected playlist, CreatorModal selected visibility), primary actions, informational alerts
     - **Remaining**: Additional decorative backgrounds, informational elements, text/links (per audit: ~300 decorative, ~150 informational, ~65 text/links)
-    - **Next batch**: Continue with remaining decorative backgrounds and informational elements
+    - **Next batch**: Continue with remaining decorative backgrounds (Header.tsx icon, etc.) and informational elements
   - **Rollback**: Restore original colors
 
 ### Sub-Epic 11.4: Visual Restraint 🟢
diff --git a/apps/web/src/components/layout/Header.tsx b/apps/web/src/components/layout/Header.tsx
index 7559d8e83..b0209c6f0 100644
--- a/apps/web/src/components/layout/Header.tsx
+++ b/apps/web/src/components/layout/Header.tsx
@@ -73,8 +73,8 @@ export function Header(_props: HeaderProps) {
             to="/dashboard"
             className="flex items-center gap-3 active:scale-95 transition-transform focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-kodo-cyan focus-visible:ring-offset-2 focus-visible:ring-offset-kodo-void rounded"
           >
-            <div className="w-10 h-10 bg-kodo-cyan/20 rounded-xl flex items-center justify-center border border-kodo-cyan/30 shadow-neon-cyan/20 animate-scan">
-              <Cpu className="w-6 h-6 text-kodo-cyan animate-pulse-glow" />
+            <div className="w-10 h-10 bg-kodo-steel/20 rounded-xl flex items-center justify-center border border-kodo-steel/30 shadow-2xl animate-scan">
+              <Cpu className="w-6 h-6 text-kodo-steel animate-pulse-glow" />
             </div>
             <div className="hidden sm:block">
               <h1 className="text-3xl font-display font-bold text-white tracking-widest uppercase leading-tight">