That's because there are different answers, Saggers. The GW website does have a painting tutorial for TSons that will list the colors they use, but theirs is not the only 'right' way to paint TSons.
Some like darker blues with golden contrasts, while some prefer the brighter blues and yellows. Others even go with the Preheresy colors, and let me tell you, Red TSons are a drastic change from the norm.
Go with what you like.