Definitions of Terms.
Primary Colors—Red, Yellow, and Blue are called the primary colors, because they are the first or original colors from which all others can be made.
Secondary Colors—Orange, Green, and Violet are called the secondary colors, because they are of the second formation, each color being produced by a mixture of two of the primary colors. The Orange, from red and yellow; the Green, from yellow and blue; and the Violet, from blue and red.
Tertiary Colors—Russet, Olive, and Citron are called the tertiary colors, because they are of the third formation, each color being produced by a mixture of two of the secondary colors. The Russet, from orange and violet; the Olive from violet and green; and the Citron, from green and orange.
A Full Color is a color in its purest state—one which has not been changed by the addition of white or black. The primaries, secondaries, and their various hues are full colors. See Plate 32.
A Hue is a primary or secondary color slightly changed by the addition of a neighboring color, For example, a green-blue is a hue of blue; a blue-green is a hue of green. See Plate 32.
A Tint is a very light or pale color, produced by adding a small quantity of color to a greater quantity of white. For example see Plates 19, 20, and 21.
A Shade is a dark or broken color, produced by the mixture of a full color with gray or black. For example see Figs. 31 to 36, and many others throughout this work.
A Half-tone is a color reduced to about one-half its original strength by the addition of white. For example see Plates 17 and 18.
The Light Tones of a color are the various degrees of color produced by the mixture of a full color with white. For example, Fig. 133 on Plate 17, and Fig. 149 on Plate 19, are two of the light tones of red.
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