Quote
"Colour has a logic as exact as that of form. One must not give up before capturing that first impression."
"When you are representing a white body surrounded by ample space, since the white has no colour in itself it is tinged and in part transformed by the colour of what is set over against it. If you are looking at a woman dressed in white in the midst of a landscape the side... exposed to the atmosphere... since this atmosphere is itself blue, the side of the woman which is exposed to it will appear steeped in blue. ...[A]ll the parts of the folds [of her dress] which are turned towards the meadow will be dyed by the reflected rays to the colour of the meadow; and thus she becomes changed into the colours of the objects near, both those luminous and those nonluminous."

Color is the visual perception produced by the activation of the different types of cone cells in the eye caused by light. Though color is not an inherent property of matter, color perception is related to an object's light absorption, emission, reflection and transmission. For most humans, visible wavelengths of light are the ones perceived in the visible light spectrum, with three types of cone
"Colour has a logic as exact as that of form. One must not give up before capturing that first impression."
"[Color effects] are never absolute but are relative to the total situation..."
"There, for the price of just two sous, I found crépons and rice papers in astonishing colours. I covered the walls of my room with these naïve and gaudy pictures. ...It was not until much later that I became aware of the beauty of the great Japanese masters, more subdued by far, yet less elucidating in terms of pure colour."
"When Michael saw this host, he first grew pale, As angels can; next like Italian twilight, He turned all colours—as a peacocks tail, Or sunset streaming through a Gothic Skylight In some old abbey, or a trout not stale, Or distant lightning on the horizon by night Or a fresh rainbow, or a grand review Of thirty regiments in red, green, and blue."
"Just as when painters are elaborating temple-offerings, men whom wisdom hath well taught their art,—they, when they have taken pigments of many colours with their hands, mix them in due proportion, more of some and less of others, and from them produce shapes like unto all things, making trees and men and women, beasts and birds and fishes that dwell in the waters, yea, and gods, that live long lives, and are exalted in honour,—so let not the error prevail over thy mind, that there is any other source of all the perishable creatures that appear in countless numbers. Know this for sure, for thou hast heard the tale from a goddess."
"I think it pisses God off if you walk by the color purple in a field somewhere and don’t notice it."