An instance of a Color Model in which every color is represented by a specific point in space, and thus has a specific set of three or more numbers that describe it. It also has a specific gamut or range of colors as one of its chief characteristics.

As example would be RGB space of a particular monitor, where a certain color has a specific set of three numbers representing the amounts of the red, green, and blue phosphors needed to reproduce that color. Another example would be within the RGB model there are different color spaces like: aRGB and sRGB. Each color space is defined by the same axes, but differ in gamut and other characteristics. Gamut is the total range of colors produced by a device.

Note that there can be many color spaces that use the same color model (for example, every monitor essentially has it's own specific color space, but all use the RGB color model).

Color Space Array (CSA)
Color space description that specifies source color characteristics. (These are usually embedded in PostScript Level 2 and PostScript Level 3 EPS files.) A CSA is based on the monitor settings of the application or is specified by the printer driver.