Color Observed

additive ancient animal appear applied areas artists associated beam become birds blue body brain building called caused cells century changes Chapter characteristic chemical colour colour vision combined complementary contained continuous contrast dark depends developed dyes effects emotional energy experience field Figure flag flowers give green grey hues human illumination important industry insects instance intensity known London match material means measurement mixed mixture natural nerve object observer obtained occur optical orange organic painters painting patterns perception phenomena photograph physical pigments plants present primaries principle produced purple range rays receptors reflected refraction response result retina saturated scale scientific seen selection sensation sometimes spectral spectrum standard structure subtractive surface symbolism techniques theory tion types various varying visible visual wavelengths white light yellow