Thread:Project:Support desk/How can I change the background color of the skin Vector?

Hi, I have a question: can you tell me how to change the background color of the skin Vector in Mediawiki 1.25.1? Until now I used MediaWiki 1.22 and was sufficient just change the color in the file screen.less... But now it looks totally different and I do not understand what I have to change.

Thank you!