Quote
"Colour has a logic as exact as that of form. One must not give up before capturing that first impression."
"[W]ith a Perpendicular right Line drawn cross from one Side to the other, distinguished it into two equal Parts. One of these Parts I painted with a red Colour and the other with a blew. The Paper was very black, and the Colours intense and thickly laid on... This Paper I viewed through a Prism of solid Glass... Beyond the Prism was the Wall of the Chamber under the Window covered over with black Cloth, and the Cloth was involved in Darkness... These things being thus ordered, I found... the Light which comes from the blew half of the Paper through the Prism to the Eye, does... suffer a greater Refraction than the Light which comes from the red half, and by consequence is more refrangible."

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."