MIXTURE & BALANCE
N5, as will also N7 and N3, N8 and N2, or N9 and N1. But N9 and N3 will unite to form N®, which is midway between 3 and 9.
(66) When this numbered scale of values is familiar, it serves not only to describe light and dark grays, but the value of colors which are at the same level in the scale. Thus R’ (popularly called a tint of red) is neither lighter nor darker than the gray of N?. A numeral written above to the right always indicates value, whether of a gray or a color, so that R1, R2, R3, R4, R5, R6, R7, R8, R9, describes a regular scale of red values from black to white, while G1, G2, G3, etc., is a scale of green values.