Color (American usage); colour (international usage)
Color is a visible property of light, and, derived from this, of objects and substances. For pure monochromatic light, color is directly determined by the energy per photon. For mixtures of light, see color vision.
In quantum chromodynamics, color or color charge, refers figuratively to a certain property of quarks. It can attain the three values "red", "green" and "blue". Quarks of different colors are attracted and quarks of like color are repelled by the strong nuclear force. Color charge is not related to electromagnetic radiation or human color perception in any way.
In astronomy, color is the difference of the observed magnitudes of an object in two different wavelengths.
In journalism, color is vivid but peripheral commentary on an event, especially in broadcast sports.
In typography, color is the apparent tone of a page of type; a well-justified and properly spaced page is said to have a good color, whereas a poorly-spaced specimen will be uneven and broken with "rivers" of white space and other flaws.
In a deck of playing cards, a color is any of the four suits hearts, spades, diamonds and clubs.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.