North Carolina General Statutes
Chapter 144 - State Flag, Official Governmental Flags, Motto, and Colors
§ 144-6 - State colors.

144-6. State colors.
Red and blue, of shades as adopted and appearing in the North Carolina State flag and the American flag, shall be, and hereby are, declared to be the official State colors for the State of North Carolina.
The use of such official State colors on ribbons attached to State documents with the great seal and/or seals of State departments is permissive and discretionary but not directory. (1945, c. 878.)