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 color temperature
LastModified: Thursday, February 01, 2007 

Color temperature refers to a characterization of the spectral properties of a light source and is commonly used during the production phase in the film and photography industries. Low color temperature is the warmer, more yellow to red light while high color temperature is the colder, more blue light. Daylight, for example, has a lower color temperature near dawn and a higher one during the day. The standard unit of measurement for color temperature is Kelvin (K). Some typical color values include the following;

  • candles or oil lamps: 1000K
  • household light bulbs: 2500K
  • bright sunshine on a clear day: 6000K
  • very overcast sky: 10,000K

  Related Links

Colour Temperature Chart
A guide showing several typical color temperatures in Degrees Kelvin.

Interactive Color Temperature in a Virtual Radiator
The tutorial initializes with a black cooking pot appearing in the window in a cool state. By translating the Color Temperature slider beneath the pot, visitors can adjust the temperature of the pot, and then monitor the color changes and their relationship to absolute temperature on the Kelvin scale (changing values are indicated on the right-hand side of the pot).

Lighting Design Knowledgebase
Color temperature is a simplified way to characterize the spectral properties of a light source. While in reality the color of light is determined by how much each point on the spectral curve contributes to its output, the result can still be summarized on a linear scale.

Sizes.com: Color Temperature
A measure of the distribution of power in the spectrum of white, or colorless, light, stated in terms of the kelvin temperature scale. The human visual system is incredibly adept at quickly correcting for changes in the color temperature of light; many different kinds of light all seem "white" to us.

related categories:

Color

Digital Cameras

Digital Photography

Video

related terms:

CIE color model

CMYK

color separation

colour depth

digital camera

digital photography

digital video

focal length

focus spread

F-stop

white balance

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