If it's a question then currently there's the dark theme only IMO. But if it's a suggestion, go to Edit Title / Thread Tools -> Edit Thread -> Change the prefix to "Suggestion". (Or maybe I'd pull him here: @Nocturne)
And in case you were waiting for a response from the community administrators, let me inform you that they are already working on it (as you'd read in the topic I linked to). Plus there's an userscript posted there that you can use in the meanwhile. ^^'