There seems to be a federal law requiring that department stores use lower-case sans serif type on a brown background for their signage; Macy's, JC Penney, Bloomingdale's, I'm sure there are a few others. Some stores violate the rule by using sans serif uppercase, like Robinsons/May and Nordstrom.
I figured that Costington's, the upscale store the Simpsons occasionally venture into, would probably follow the fashion, so my version of their logo uses Kabel Light, an inoffensive beige background, and a faceted diamond replacing the dot on the i.
