Light colour describes the colour appearance of a lamp's light. Light colours are based on colour temperature expressed in degrees Kelvin (K):

warm white (ww) < 3,300 K

neutral white (nw) 3,300 K to 5.300 K

daylight white (dw) > 5,300 K

Lamps with the same light colour can have different colour rendering properties.

Light colour helps create the atmosphere of a room: warm white light is predominantly found cosy and comfortable; neutral white light creates a more businesslike atmosphere. In interiors where illuminance is less than 1,000 lux, daylight white light makes surroundings look pale and monotonous. This lighting atmosphere assessment applies to Central Europe. In Southern Europe, for example, daylight white light is preferred.