diff --git a/src/UIShell/HeaderAction.svelte b/src/UIShell/HeaderAction.svelte
index a574200b..ce6f3932 100644
--- a/src/UIShell/HeaderAction.svelte
+++ b/src/UIShell/HeaderAction.svelte
@@ -126,6 +126,7 @@
     class:bx--header-panel={true}
     class:bx--header-panel--expanded={true}
     style:overflow-y="auto"
+    style:color-scheme="dark"
     transition:slide|local={{
       ...transition,
       duration: transition === false ? 0 : transition.duration,