Color Temperature is a number that defines the range of color meaurement for artificial light sources and varying conditions of natural daylight. Color Temp is stated as a number within a range from about 1500 to 10,000 and is appended with the letter 'K' which stands for Kelvin. Color temperature settings in-camera will match the lighting sources used to the color temp being recorded. Color Temperatures of lighting fixtures and natural sources range in the warm hues of fire and candles from about 2000 Kelvin to 32K (3200 Kelvin) and are referred to as "indoor" lighting. 56K (5600 Kelvin) is referred to as "outdoor" light, matching the sun.