Change color of contribution

src/components/TopicDetail/TopicDetail.tsx

@@ -593,7 +593,7 @@ export function TopicDetail(props: TopicDetailProps) {
                   <a
                     href={contributionUrl}
                     target="_blank"
-                    className="hidden items-center justify-center rounded-md border bg-gray-200 px-2 py-2 text-sm hover:bg-gray-300 sm:flex"
+                    className="hidden transition-all items-center justify-center rounded-md px-2 py-2 text-sm hover:bg-gray-200 sm:flex"
                   >
                     <GitHubIcon className="mr-2 inline-block h-4 w-4 text-current" />
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