<P> The different color response of different devices can be problematic if not properly managed . For color information stored and transferred in digital form, color management techniques, such as those based on ICC profiles, can help to avoid distortions of the reproduced colors . Color management does not circumvent the gamut limitations of particular output devices, but can assist in finding good mapping of input colors into the gamut that can be reproduced . </P> <P> Additive color is light created by mixing together light of two or more different colors . Red, green, and blue are the additive primary colors normally used in additive color systems such as projectors and computer terminals . </P> <P> Subtractive coloring uses dyes, inks, pigments, or filters to absorb some wavelengths of light and not others . The color that a surface displays comes from the parts of the visible spectrum that are not absorbed and therefore remain visible . Without pigments or dye, fabric fibers, paint base and paper are usually made of particles that scatter white light (all colors) well in all directions . When a pigment or ink is added, wavelengths are absorbed or "subtracted" from white light, so light of another color reaches the eye . </P> <P> If the light is not a pure white source (the case of nearly all forms of artificial lighting), the resulting spectrum will appear a slightly different color . Red paint, viewed under blue light, may appear black . Red paint is red because it scatters only the red components of the spectrum . If red paint is illuminated by blue light, it will be absorbed by the red paint, creating the appearance of a black object . </P>

Identify the colors of led lights and their wavelengths (nm)