I think the background color for code blocks is subtle by design, for inline code it keeps it readable, as text, within the sentence Slack makes inline code garish and it impedes readability. Code::Blocks Dark : Code::Blocks original theme in a dark manner. Re: General dark theme (not only for editor) No it is not possible, because codeblocks uses wxWidgets. Those platforms primarily about sharing code while the Discourse platform and TidBITS site are more general. All the themes that you imported will be available under the color theme drop list. when our page is loaded and our IndexPage component has been mounted, we retrieve the users set preference if theyve already set one from their earlier visit the localStorage. Whereas both GitHub and Stack are nicely contrasted. Go to Settings > Editor > Syntax highlighting.