Raspberry would be good. So would lime, creamy vanilla, orange sherbet, blueberry, even a dark and tarry licorice - but not chocolate or caramel. No, I'm not talking ice cream flavors. This is a list of the colors that you might consider wearing when you visit Saigon Express. The restaurant's interior is the most amazingly intense light blue I have ever encountered in a restaurant, and since there is nothing on the walls to compete, you are it. So don't clash. (To the woman with the raspberry blouse - who prevailed on the congenial owner to allow her to come back and pay later - you're the inspiration for all this.)- Ron Bechtol