When refering to "pure" colors (red, green, blue, orange) what is the corresponding notation in the Munsell system?
is a description of the Munsell hue scale directly quoted from Fairchild's book, "Color Appearance Models, 2nd Ed."."The hue circle in the Munsell system is divided into five principle hues (purple, blue, green, yellow, and red, denoted 5P, 5B, 5G, 5Y, and 5R, respectively) and is designed to divide the complete hue circle into equal perceptual intervals. Five intermediate hues are also designated in the Munsell system as 5PB, 5BG, 5GY, 5YR, and 5RP for a total of 10 hue names. For each of the ten hues there are ten integral hues with notations as illustrated by the range between 5PB and 5P, which is 6PB, 7PB, 8PB, 9PB, 10PB, 1P, 2P, 3P, and 4P. This type of sequence continues around the entire hue circle resulting in 100 integer hue designations that are intended to be equal perceived hue intervals. Hues intermediate to the integer designations are denoted with decimal values (e.g., 7.5PB)."