ISCC-NBS system

colorimetry [Etymology: Inter-Society Color Council - National Bureau of Standards] USA A formal system for expressing colour, with standard symbols for hue, qualified for lightness and saturation. (See also CIE system.) Derived from the Munsell system, its basic codes for hue are:
B = blue, bG = bluish green.
Br = brown, brO = brownish orange, brPk = brownish pink.
G = green, gB = greenish blue, gY = greenish yellow
O = orange, OY = orange yellow.
Ol = olive, OlBr = olive brown, OlG = olive green.
P = purple, pB = purplish blue, pPk = purplish pink, pR = purplish red.
Pk = pink.
R = red, rBr = reddish brown, rO = reddish orange, rP = reddish purple.
V = violet.
Y = yellow, yBr = yellowish brown, yG = yellowish green, yPk = yellowish pink
YG = yellow green.