I given them colored eyes for now. So Heres who they are

Red- A very shy, big nerd. Has depression, can be sad a lot.
Green- An Outgoing, StudMuffin/Jock. Is seen usually cheering Red up. They both need each other

Blue- A "cool cat", very clever. Has been in love with Orange since kids.
Orange- A kind hearted Girl, She is best friends with Blue then dated.

Yellow- Very Smart Lady, very intelligent, and kind
Purple- Sister to Blue, Is pretty mischeavous, pretty sassy. But always nice to Yellow