how about, if we have battle of color level star, like for example, one week is full of black level, another week is brown, and it go on and on. the winner of each color level star will complete against other winner.
so it would take 9 weeks to get to the end and i am sure that people will have changed colour level by then and seeing how fast some people seem to rise these days you would have a stars full of black levels anyway lol