To enhance the vibrancy of cooler paint colors, you’ll want to choose lighting with a color temperature that falls between 4000K and 6000K. LEDs and CFLs within this color temperature range are called either “cool white” or “stark white.” If you were to use a light source with a low color temperature against blue or green paint, the color might appear dull and distorted.
Brightness and Color Rendering
The color temperature of a light source isn't the only thing that affects the way we see color; brightness of the light, or lumen output, does as well. Rooms with darker colors painted on the walls tend to absorb more light than a room with light colored walls and tend to look dull if the lighting is not bright enough. The brighter the lighting, the more the true color of your walls will stand out. However, the dimness or brightness of your room and how it reacts to color is all a matter of personal preference.
Another factor to keep in mind is the Color Rendering Index (CRI) of the light source that you're using. Ranging from 0-100, this index determines how a light source will make a color appear to the human eye. The higher the lamp's CRI, the better it's color rendering capabilities. While standard incandescent lamps usually have a CRI of 100, LEDs have about 80+ CRI, and fluorescents range anywhere from 50 to 90. As this video shows below, two of the same light sources with differing CRI ratings will cause colors to appear differently in tone.