i think you can't go wrong with any of the colors you've narrowed down: black, white or blue. black will definitely be one of those bags that will last you for an eternity and will go with everything. white is great but i'm afraid to get the INSIDE dirty. and the blue is just....breathtaking but not for everyone as the edges typically turn darker than the rest of the bag. it may bother some people if the bag isn't all 1 color over time.
Oh, this is really interesting. Have alot of people had this happen?