The four colors are Heroine, Ablaze, Embrace Me and Silly. I Love Love Heroine and Embrace Me, not saying they aren't all incredible.
Heroine is a vivid purple, while Embrace Me is a bright pink, Silly is more a softer pink, and Ablaze is a coral.
As usual MAC doesn't let us down with bright beautiful colors. I already bought the Embrace Me lipstick and can't wait to see the rest of the collection fill up my makeup box.