37 C.F.R. § 7.12 Claim of color.
Title 37 - Patents, Trademarks, and Copyrights
(a) If color is claimed as a feature of the mark in the basic application and/or registration, the international application must include a statement that color is claimed as a feature of the mark and set forth the same name(s) of the color(s) claimed in the basic application and/or registration. (b) If color is not claimed as a feature of the mark in the basic application and/or registration, color may not be claimed as a feature of the mark in the international application.
Title 37: Patents, Trademarks, and Copyrights
PART 7—RULES OF PRACTICE IN FILINGS PURSUANT TO THE PROTOCOL RELATING TO THE MADRID AGREEMENT CONCERNING THE INTERNATIONAL REGISTRATION OF MARKS
Subpart B—International Application Originating From the United States
§ 7.12 Claim of color.