Expect covers from The Decemberists (pink), Adele (tan), Snoop Dogg (green), Lana Del Rey (blue), Alabama Shakes (black), Bell and Sebastian (gray), Florence and the Machine (white) among dozens of others.
Music is like a rainbow.
You have to prototype. You have to see someone using your product. Only then do you get a refined design. No one gets it right the first time.