In the wiki page, the gif shows the button as white: https://github.com/Mottie/GitHub-userscripts/wiki/GitHub-copy-code-snippet.

In my system however, the button has a blue background, because of the btn-blue class here: https://github.com/Mottie/GitHub-userscripts/blob/master/github-copy-code-snippet.user.js#L25

If i remove that class, the button looks like in the wiki preview.

Would you consider removing that blue background?

If needed, I'm using violent monkey in firefox and chrome and they both show the blue background.