Subtractive Color Mixing
In 1869, Louis Ducos du Hauron (1837-1920) and Charles
Cros (1842-1888), two Frenchman working independently
announced their research on subtractive color mixing.
In subtractive mixing, which is the basis for modern color
photography, colors are created by combining cyan, magenta
and yellow dyes (the complements of red, green and blue).
The dyes are subtract colors from “white” light that contains
all colors.
Louis Ducos du Hauron
Leaves and Flower Petals, 1869