diff --git a/changelogs/fragments/7777.yml b/changelogs/fragments/7777.yml
new file mode 100644
index 000000000000..465c80e318c3
--- /dev/null
+++ b/changelogs/fragments/7777.yml
@@ -0,0 +1,2 @@
+refactor:
+- [Look & Feel] Appearance Popover Button Change ([#7777](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/7777))
\ No newline at end of file
diff --git a/src/plugins/advanced_settings/public/header_user_theme_menu.tsx b/src/plugins/advanced_settings/public/header_user_theme_menu.tsx
index b1d6f09dafff..86a78cbcc2d2 100644
--- a/src/plugins/advanced_settings/public/header_user_theme_menu.tsx
+++ b/src/plugins/advanced_settings/public/header_user_theme_menu.tsx
@@ -178,7 +178,7 @@ export const HeaderUserThemeMenu = () => {
         <EuiFlexItem grow={false}>
           <EuiCompressedFormRow hasEmptyLabelSpace>
             {/* TODO: disable submit until changes */}
-            <EuiSmallButton fill onClick={onAppearanceSubmit} type="submit">
+            <EuiSmallButton onClick={onAppearanceSubmit} type="submit">
               Apply
             </EuiSmallButton>
           </EuiCompressedFormRow>