CFR /  Title 7  /  Part 29  /  Sec. 29.3013 Combination color symbols.

As applied to Burley, combination color symbols are as follows: FL--tannish buff, FR--tannish red, VF--greenish tan, VR--greenish red, GF--green tan, and GR--green red. (See rules 17 and 18.) [51 FR 40407, Nov. 7, 1986]