| LD - V |
| LLt - O LLt - G |
In this case the contrasting colors differ, but the contrasts are equal because the color-interval between Orange and Violet is the same as the color-interval between Green and Violet. In this case the value-contrasts correspond. We must assume here, as before, that there is no difference of color-intensity to disturb the balance.
| D - R |
| HD - O LD - V |
In this case the two tones which balance on the ground-tone differ both in value and in color. They balance, nevertheless, because both the value and the color-contrasts are of the interval of the third. Again we must assume that there is no disparity of intensities to disturb the balance.
173. The reader will find the [Diagram of Values and Colors] (No. 5) very useful in making calculations for tone-balances, so far as value-contrasts and color-contrasts are concerned, leaving out considerations of color-intensity.
Taking any tone indicated on the Diagram as a ground-tone, any tones at equal distances in balancing directions will balance on that ground-tone.
Diagram 20
The various types of tone-balance are shown in the above diagram. The tones which balance, one against the other, on the ground-tone of Blue-Violet, are the tones marked by the same number.
The value and color-balances being achieved, the intensities may be adjusted, increased or diminished, until the balance is perfect.