Playlist Colors on tracks -easy categorization on the fly.

It would be really cool if we could give a track(s) a color/shade in the playlist to help spot certain styles/genres/must plays or to how ever you choose to use them .
For example -

Red = definite play or main set, stomping track etc . .

green = Mid set / maybe play / second choice

red = Starting tracks / light funky grooves etc etc . . . .

SO when we drag our tracks in the play list we can the assign one of several colors and use it to how we desire as above .. . ?

This would really help if like me has about 30/100 tracks in a set list . When its dark and you have had a few beers this would be a god send ! hehe

Thanks

Jc