Editing Color temperature (section)

===The Sun===
The [[Sun]] closely approximates a black-body radiator. The effective temperature, defined by the total radiative power per square unit, is 5772&nbsp;K.<ref>{{cite web |last=Williams |first=David R. |year=2022 |title=Sun Fact Sheet |url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html |publisher=[[NASA]] |access-date=2023-03-24 |url-status=live |archive-url=https://web.archive.org/web/20230316150908/https://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html |archive-date=2023-03-16 }}</ref> The color temperature of [[sunlight]] above the atmosphere is about 5900&nbsp;K.<ref>{{cite web |url=http://www.crisp.nus.edu.sg/~research/tutorial/optical.htm |title=Principles of Remote Sensing |publisher=[[Centre for Remote Imaging, Sensing, and Processing|CRISP]] |access-date=2012-06-18 |url-status=live |archive-url=https://web.archive.org/web/20120702174159/http://www.crisp.nus.edu.sg/~research/tutorial/optical.htm |archive-date=2012-07-02 }}</ref>

The Sun may appear red, orange, yellow, or white from Earth, depending on [[position of the Sun|its position]] in the sky. The changing color of the Sun over the course of the day is mainly a result of the [[scattering]] of sunlight and is not due to changes in black-body radiation. [[Rayleigh scattering]] of sunlight by [[Earth's atmosphere]] causes the blue color of the sky, which tends to scatter blue light more than red light.

Some [[daylight]] in the early [[morning]] and late [[afternoon]] (the [[golden hour (photography)|golden hours]]) has a lower ("warmer") color temperature due to increased [[light scattering by particles|scattering]] of shorter-wavelength sunlight by [[atmospheric particulates]] – an [[optical phenomenon]] called the [[Tyndall effect]].

Daylight has a spectrum similar to that of a black body with a correlated color temperature of 6500&nbsp;K ([[CIE Standard Illuminant D65|D65]] viewing standard) or 5500&nbsp;K (daylight-balanced photographic film standard).

[[File:Color temperature black body 800-12200K.svg|thumb|center|512px|Approximation of the hues of the Planckian locus as a function of the kelvin temperature, rendered with a white point near 6500&nbsp;K, not accounting for [[chromatic adaptation]]]]

For colors based on black-body theory, blue occurs at higher temperatures, whereas red occurs at lower temperatures. This is the opposite of the cultural associations attributed to colors, in which "red" is "hot", and "blue" is "cold".<ref>
{{cite book
 | title = Mastering Digital Flash Photography: The Complete Reference Guide
 | author = Chris George
 | publisher = [[Sterling Publishing|Sterling]]
 | year = 2008
 | isbn = 978-1-60059-209-6
 | page = 11
 | url = https://books.google.com/books?id=j728wJySfyQC&q=blue+cool+red+hot+color-temperature+sun
 }}</ref>