A little help on module class suffix combination

Hello,
Just a quick question. I am using the GK tabs module and I would like to make the main content dark however, the only time the tabs work correctly is when I use the suffix _color3 no padding. If I use dark anywhere in the suffix the module becomes dark however, the tabs stop working correctly. I would like to have the main content with a dark background and the tabs above the dark background display as they normally would without any suffix attached. I just need the correct combination if anyone could please help me out. Thank you.

Cheers,
David

Hi

Did You try to use suffix _color3 and than after space class form the module with suffix _dark ?