Consider a painting in the room observed in the natural reflected light of the early morning, and then again by the glow of a lamp late in the afternoon. The weight, translucency, opacity, texture, qualities of substances do effect contrast, definition, glow, blend, sparkle. Effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the retina, thus making possible perception of various colors in the object. Since the colors that compose sunlight or white light have different wavelengths, the speed at which they travel through the glass differs.
Color is therefore a property of light that depends on wavelength.
When light falls on an object, some of it is absorbed and some is reflected. The color of a transparent object is determined by the wavelength of the light transmitted by it. Colors whose beams of light in various combinations can produce any of the color sensations are called primary, or spectral, colors. The additive primaries are red, green, and blue-violet. White can be produced by combining all three primary colors.