In practise most Munsell color books only show
four pages for each major hue. As seen in the figure to the
left, The major hues are Red, Yellow-Red, Yellow, Green-Yellow, Green, Blue-Green,
Blue, Purple-Blue, Purple, and Red-Purple, moving clockwise around the circle.
When illuminated by a standard light source, the
color patches on each page will appear the same to all observers anywhere in the
world. Thus by specifying a certain patch on a given page, another person with
a Munsell Color Book can identify the color specified, and know exactly what color
is meant.