Fix vertical dash bg-color class issue

Author: onesine

src/components/utils.tsx

@@ -204,5 +204,5 @@ export const VerticalDash = () => {
     const { primaryColor } = useContext(DatepickerContext);
     const bgColor = BG_COLOR["500"][primaryColor as keyof (typeof BG_COLOR)["500"]];
 
-    return <div className={`bg-blue-500 h-7 w-1 rounded-full hidden md:block ${bgColor}`} />;
+    return <div className={`h-7 w-1 rounded-full hidden md:block ${bgColor || "bg-blue-500"}`} />;
 };