You can always live out the male stereotype and find yourself a nice loud polyester houndstooth jacket/vest (Kids, don't try this at home!) to wear with your kilt...

Or perhaps you could find someone whose fashion sense you trust to look at your kilts and make a color recommendation to you?

You can also describe your kilts/list your tartans here, and we can try to give you some help - but personally, I'd try for the second option.