2. Pattern. Figure in middle red, with darker blue-green accent. Ground of middle yellow, grayed with slight addition of the red and green. Vary with purple in place of blue-green.
3. Japanese teapot. Middle red, with background of lighter yellow and foreground of grayed middle yellow.
4. Variant on No. 3. Middle yellow, with slight addition of green. Foreground the same, with more red, and background of middle gray.
5. Group. Background of yellow-red, lighter vase in yellow-green, and darker vase of green, with slight addition of black. Vary by inversion of the colors in ground and darker vase.
6. Wall decoration. Frieze pattern made of cat-tails and leaves,—the leaves of blue-green with black, tails of yellow-red with black, and ground of the two colors united and thinned with water. Wall of blue-green, slightly grayed by additions of the two colors in the frieze. Dado could be a match of the cat-tails slightly grayer. See [Fig. 23], page 82.
7. Group. Foreground in purple-blue, grayed with black. Vase of purple-red, and background in lighter yellow-red, grayed.
For analysis of the groups and means of recording them, see [Chapter III].
[23.] See Century Dictionary for definition of chroma. Under the word “color” will be found definitions of Primary, Complementary, Constants (chroma, luminosity, and hue), and the Young-Helmholtz theory of color-sensation.
[24.] It must not be assumed because so much stress is laid upon quiet and harmonious color that this system excludes the more powerful degrees. To do so would forfeit its claim to completeness. A Color Atlas in preparation displays all known degrees of pigment color arranged in measured scales of Hue, Value, and Chroma.