I think I remember you. You're the member with the adorable collection. Perhaps it was you that posted the beautiful black, white, red combo.
Anyhow, I understand your dilemma. It does seem that your collection is a bit conservative. If you really need the funds to venture out into other colors, I would keep one of the blacks and sell one. Then buy something bold, but something you'll definitely wear and not leave in your closet!
Between the work and the city, sell the one that you use less.