Color temperature can be used to gauge the hue of white that a light source produces. It is measured in degrees Kelvin (K) and can be used to determine the warmth (yellowish hue) or coolness (bluish hue) of a white light.
In many public areas, a warmer white is chosen to promote relaxation, where a cooler white may be chosen in buildings where concentration is important, such as offices.
Below is a scale that will graphically display the range of the color temperature scale.
Some common colors associated with the color temperature scale are: