For example, a bright Yellow, or Cyan cannot be displayed correctly in the RGB gamut. A printed document, or the CMYK mode is similar in size to the gamut of RGB colors. There are 3 factors that can be used to define and manipulate color. Hue, Saturation, and Brightness. Hue is the name of the color that places it in a distinct position on the spectrum.
Saturation refers to the degree of hue in a color.
It is a factor that enables you to distinquish a hue as being pale or rich. Brightness refers to the property of a color that reflects light back to the eye and describes how light or dark a color appears. The simplest way to check for color accuracy is by visual comparison. If your system is well calibrated, you can view the printed output under standard viewing and lighting conditions. This method is easy, but highly inaccurate.