diff --git a/src/apps/dashboard/static/apps/dashboard/note.js b/src/apps/dashboard/static/apps/dashboard/note.js
index d292eea..c3c806d 100644
--- a/src/apps/dashboard/static/apps/dashboard/note.js
+++ b/src/apps/dashboard/static/apps/dashboard/note.js
@@ -92,7 +92,17 @@ const Brief = (() => {
         banner.querySelector('.note-banner__fyi').addEventListener('click', function () {
             if (opts.target_selector) {
                 var target = document.querySelector(opts.target_selector);
-                if (target) target.classList.add('bud-duplicate-flash');
+                if (target) {
+                    target.classList.add('bud-duplicate-flash');
+                    // Auto-ease-out — the SCSS rule has a 600ms transition
+                    // on color + text-shadow, so removing the class 3s after
+                    // FYI lets the peak state breathe before fading back to
+                    // the default text styling. Without this the flash
+                    // persisted til page refresh.
+                    setTimeout(function () {
+                        target.classList.remove('bud-duplicate-flash');
+                    }, 3000);
+                }
             }
             banner.remove();
         });
diff --git a/src/static/tests/NoteSpec.js b/src/static/tests/NoteSpec.js
index 35c8065..71d091a 100644
--- a/src/static/tests/NoteSpec.js
+++ b/src/static/tests/NoteSpec.js
@@ -230,6 +230,25 @@ describe('Brief.showDuplicateBanner', () => {
         expect(name.classList.contains('bud-duplicate-flash')).toBeTrue();
     });
 
+    it('D7b: .bud-duplicate-flash auto-eases out — class is removed ~3s after FYI', () => {
+        jasmine.clock().install();
+        try {
+            Brief.showDuplicateBanner({
+                display_name: 'alice',
+                target_selector: '.bud-entry[data-bud-id="42"] .bud-name',
+            });
+            document.querySelector('.note-banner__fyi').click();
+            const name = fixture.querySelector('.bud-name');
+            // Immediately after FYI: flash is on (the visible peak state).
+            expect(name.classList.contains('bud-duplicate-flash')).toBeTrue();
+            // After the auto-dismiss window: flash is gone.
+            jasmine.clock().tick(3001);
+            expect(name.classList.contains('bud-duplicate-flash')).toBeFalse();
+        } finally {
+            jasmine.clock().uninstall();
+        }
+    });
+
     it('D8: FYI dismisses cleanly when target_selector is missing', () => {
         Brief.showDuplicateBanner({ display_name: 'alice' });
         document.querySelector('.note-banner__fyi').click();
diff --git a/src/static_src/scss/_bud.scss b/src/static_src/scss/_bud.scss
index 80f4820..ab14acb 100644
--- a/src/static_src/scss/_bud.scss
+++ b/src/static_src/scss/_bud.scss
@@ -177,11 +177,12 @@ html:has(#id_kit_bag_dialog[open]) #id_bud_btn {
 // Eased-in flash applied by Brief.showDuplicateBanner's FYI button to a
 // caller-supplied target element — one of .bud-entry .bud-name (My Buds),
 // .post-recipient (post share), or .gate-slot.filled (gatekeeper invite).
-// Persists until page refresh; --terUser color + --ninUser text-shadow
-// per the duplicate-guard spec.
+// Class is auto-removed by note.js 3s after FYI; SCSS transition handles
+// both the ease-in (on add) AND the ease-out (on remove). Palette swap
+// vs. the original spec: color = --ninUser, text-shadow = --terUser.
 
 .bud-duplicate-flash {
-    color: rgba(var(--terUser), 1);
-    text-shadow: 0 0 0.5em rgba(var(--ninUser), 1);
+    color: rgba(var(--ninUser), 1);
+    text-shadow: 0 0 0.5em rgba(var(--terUser), 1);
     transition: color 600ms ease, text-shadow 600ms ease;
 }
diff --git a/src/static_src/tests/NoteSpec.js b/src/static_src/tests/NoteSpec.js
index 35c8065..71d091a 100644
--- a/src/static_src/tests/NoteSpec.js
+++ b/src/static_src/tests/NoteSpec.js
@@ -230,6 +230,25 @@ describe('Brief.showDuplicateBanner', () => {
         expect(name.classList.contains('bud-duplicate-flash')).toBeTrue();
     });
 
+    it('D7b: .bud-duplicate-flash auto-eases out — class is removed ~3s after FYI', () => {
+        jasmine.clock().install();
+        try {
+            Brief.showDuplicateBanner({
+                display_name: 'alice',
+                target_selector: '.bud-entry[data-bud-id="42"] .bud-name',
+            });
+            document.querySelector('.note-banner__fyi').click();
+            const name = fixture.querySelector('.bud-name');
+            // Immediately after FYI: flash is on (the visible peak state).
+            expect(name.classList.contains('bud-duplicate-flash')).toBeTrue();
+            // After the auto-dismiss window: flash is gone.
+            jasmine.clock().tick(3001);
+            expect(name.classList.contains('bud-duplicate-flash')).toBeFalse();
+        } finally {
+            jasmine.clock().uninstall();
+        }
+    });
+
     it('D8: FYI dismisses cleanly when target_selector is missing', () => {
         Brief.showDuplicateBanner({ display_name: 'alice' });
         document.querySelector('.note-banner__fyi').click();