| Wt | ||
| HLt | Y | |
| 7th | ||
| Lt | V | |
| 5th | ||
| LLt | G | |
| 7th | ||
| M | R | |
| 5th | ||
| HD | B | |
| 7th | ||
| D | O | |
| 5th | ||
| LD | V | |
| Blk | ||
In the sequence just given the alternation is, from the keynote Low Dark Violet, first in the Right Mode a fifth, then in the Left Mode a seventh: this through the Scale of Values up to White. The order of the previous sequence is inverted. This particular alternation might be described as the relation of a fifth and seventh repeated in the Right Mode.
The alternation of intervals of the fifth with intervals of the third gives some interesting sequences, in which the alternation of intervals is, necessarily, an alternation of modes.
| Wt | ||
| HLt | Y | |
| 3d | ||
| Lt | G | |
| 5th | ||
| LLt | O | |
| 3d | ||
| M | Y | |
| 5th | ||
| HD | R | |
| 3d | ||
| D | O | |
| 5th | ||
| LD | V | |
| Blk | ||
157. I have by no means exhausted the possibilities of value and color combination, but I have indicated a sufficient number to serve the purposes of experimental practice in tone-relations, for a long time to come. The sequences which I have found most interesting, in my own experiments, have been the diagonal sequences of the two modes, using intervals of the fifth, and the diagonal sequences in which with equal value-intervals there is an alternation of certain color-intervals,—the seventh and the fifth, and the seventh and two fifths. It may very well be that these particular sequences interest me because I have used them more than others and consequently think in them more easily.
158. For the purposes of Pure Design the Scale of Nine Values, including Black and White, will be found sufficient; but when it comes to the combination of Design with Representation, and particularly to Representation in Full Relief, it will be necessary to introduce intermediates into the Scale of Values. With this purpose in view I give one more diagram in which intermediates of value have been introduced. For convenience in drawing out the different sequences upon this diagram I have repeated the Scale of Colors showing the connection of Violet-Red with Red. This [diagram (5)] is simply an extension of the Diagram of Values and Colors given on [p. 137].
159. We may use the various sequences I have described without mixing the tones, using the tones one at a time as they may be required; but if we choose we may mix adjacents or thirds or even threes. In that way the tone-possibilities of each sequence may be very much extended. It may be well to show what the extension amounts to by giving one of the sequences with an indication of the result of mixtures within the limits described.
| Seq. LD-R ⍂ 5ths | |
| Wt | |
| HLt | R |
| Lt | Y |
| LLt | B |
| M | R |
| HD | Y |
| D | B |
| LD | R |
| Blk | |
This is the sequence in which we decide to mix adjacents, thirds, and threes.
A DIAGRAM OF VALUES AND COLORS