138. It is important to distinguish between degrees of intensity and
degrees of neutralization. The degrees of color-intensity and of
color-neutralization, in any value, are described by fractions. The
formula D-R¾ means, value Dark, color Red, intensity three quarters.
The formula D-R, ¾N means, value Dark, color Red, three quarters
neutralized. The formula M-O½ means, value Middle, color Orange,
intensity one half. The formula M-O, ½N means, value Middle, color
Orange, half neutralized. M-O, ½N is a tone somewhat less intense
in color than M-O½, as may be seen on the diagram. The degree of
neutralization has reference, in all cases, to the maximum intensity
for the given value. What that is, theoretically, may be seen by
referring to the triangle of the color, in which the possibilities of
intensity, in different values, are clearly indicated.