Okla. Stat. tit. 63, § 63-131: Gasoline kept in red tanks

All grocers, druggists, and all other vendors of gasoline in

quantities of one hundred fifty (150) gallons and less are hereby

required to put all gasoline by them hereafter kept for sale, or

sold, in a red can, tank, barrel or other receptacle, which

receptacle shall be labeled "Gasoline," and vendors of kerosene in

quantities of two hundred fifty gallons or less shall not put

kerosene in any can, tank, barrel or other receptacle painted red:

Provided, that all dealers shall be required to keep for use and

shall place all gasoline by them sold in red cans or other

receptacles.