37 CFR § 7.12 - Claim of color.

(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.