Page:The color printer (1892).djvu/98

 tint (the complement of yellow). This experiment plainly shows that the complement of blue is a color which is an equal mixture of red and yellow.

Any two colors which are complementary will produce white when subjected to the experiment just described. If it be applied to any two colors shown in the chromatic circle which are not complementary, then the result will be different, and instead of white we will see a tint which is produced by an equal mixture of the complement's of the two colors upon the retina, and which in every case lies about half way between the complements of the two colors selected. For example, say we try orange and violet — see illustration below. After shifting the eyes at regular intervals of a second each, from one to the other of the two colors named, for a half minute, then suddenly looking at the black dot between the two, we will see a pure green tint, which is an equal mixture of a bine tint (the complement of orange) with a yellow tint (the complement of violet).