In a color space, each visible color is assigned a distinct position in terms of coordinates. The total of all possible colors inside a given color system (like RGB or CMYK) adds up to a virtual shape inside this coordinate system. This shape is called a color space. Reproduction media like computer screens cannot display all visible colors. Printing or photographic reproduction technologies also have various intrinsic limitations of color reproduction. If colors are to be reproduced, meaning to be trans- ported from one medium to another, you need to know the color limitations of the different media. This is exactly what color spaces and gamuts are about—they are mathematical descriptions of the total number of displayable colors. Color spaces are vital components of the information being saved in color profiles.