Opaque and subtractive. White lightens; the complement shades.
Red
warm · Complementary
Value78%
Saturation86%
Harmony
Opposites on the wheel. Maximum contrast; the complement shades without black.
Red
warm · Complementary
R 163 · G 58 · B 54 S 86% · V 78%
#a33a36Base
#367056Complement
Values · tints and shades
In the studio
A touch of the complement shades without the dirtiness of black. Orange knocks ultramarine down to a warm neutral; green does the same for cadmium red. Mix on the canvas, as little as possible on the palette.
Mixing tray
Pick two colors from the wheel or a pigment and see the result.
Chromatic neutral
Near-complements: a tinted gray is born. Gold for shadows; mud if you use it in the lights.