Currently the courts are split on the issue of forcing changes to sign colors. Bobby is referencing a 9th Circuit ruling in the Blockbuster case. However two courts, including an appeals court, have upheld municipalities' right to restrict sign color in the 2nd Circuit. The Supreme Court has yet to take up the issue.
natlawreview.com
Can the Town Make Me Change My Sign?
A business’ signage can be one of the most distinctive characteristics of its brand and one of its most important assets. This is especially true when the sign display’s the business’ federally registered trademark and color is a feature of the mark. But what happens when that brand runs afoul...