Water color, line drawing, color print, oil painting. Original generation of color photograph- color negative. Each new generation - shifts in color, increased grain, loss of image resolution. Expensive, excellent reflection copy. All colors- on white paper.
Inks filter subtracting pure color from white light- combining the rest.
Each primary color - absorbs its complementary color from white light. The whiteness of paper measured by the degree of equal red, green, blue reflectance under standard illumination. Brightness - reflectivity of substrate at 457 nm. DIN, Ostwald, Munsell systems. Without light there is no color to be seen.