CFR › Title 7 › Part 29 › §29.35107 CFR §29.3510Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkAs applied to Dark Air-cured tobacco, color symbols are L—light brown, F—medium brown, R—reddish brown, D—dark brown, M—mixed, and G—green.