Lt R O Y G B V
D R O Y G B V
This scale gives us a variety of color-contrasts with one
value-contrast. The colors are taken at the interval of the third. They
might be taken at any interval up to that of the seventh, in which
case we should have a contrast of complementary colors in two values,
each color occurring in each value. The monotony of value which is
inevitable in any single horizontal sequence is in the combination of
two or more such sequences avoided. I have used the Red-Yellow-Blue
triad in three and in five values with satisfaction. Each value
represents a plane of light in which certain differences of color are
observed.
153. Any two of the sequences which I have described as of the Diagonal
may be combined, in two ways. First, two sequences of the same mode may
be combined. Second, two sequences of different modes, one of the Right
Mode and one of the Left Mode, may be combined.