Produces a color that represents the radiation emitted by an ideal black body heated at the given temperature in the visible spectrum. This allows you to easily create plausible light colors based on standard temperature measurement.

Input Parameters


The temperature (in kelvin) of the black body. Color temperatures over 5,000K are called cool colors (bluish white), while lower color temperatures (2,700 to 3,000 K) are called warm colors (yellowish white through red).


Top: linear ramp from 1,000K to 6,500K at -22 exposure. Bottom: linear ramp from 5,000K to 15,000K at -28 exposure.

Temperature Value Source
1700 Match flame
1850 Candle flame, sunset/sunrise
2700 to 3300 Incandescent lamps
3000 Soft (or warm) white compact fluorescent lamps
3200 Studio lamps, photofloods, etc.
3350 Studio "CP" light
4100 to 4150 Moonlight
5000 Horizon daylight
5500 to 6000 Vertical daylight, electronic flash
6200 Xenon short-arc lamp
6500 Daylight, overcast
6500 to 10500 LCD or CRT screen
15000 to 27000 Clear blue poleward sky
RIB: float temperature
Default: 5500.0

Physical Intensity

When set to 1, the color will emit the correct amount of energy. WARNING: Your color will become super intense.

RIB: float physicalIntensity
Default: 0.0


Use exposure to adjust the amount of emited energy. Very useful if physical intensity is above zero.

RIB: float exposure
Default: 0.0

Output Parameters


The color emitted from the black body that was heated to the given temperature.


The R channel from the resultRGB output.


The G channel from the resultRGB output.


The B channel from the resultRGB output.