Now I have time to brainstorm a few ideas (finally :p)
1) A short explanation what the colors do/should do (P= Primary, S= Secondary)
Blue: P = Cardadvantage, S= Copy/Clon, mill, evasion, combattricks, bounce, tap, artifactssynergy
Black: P = Grave, Sac, S= token, removalbeast, Zombies or...