Editing RGB color spaces (section)

==Applications==
{{See also|List of color spaces and their uses|label 1 = List of Color Spaces}}
[[Image:1Mcolors.png|thumbnail|100px|left|One million colors in RGB space, visible in full-size image]]
<!-- There should probably be a mention of the CIE 1931 RGB space here, with an explanation of its use. -->
RGB color spaces are well-suited to describing the electronic display of color, such as [[computer monitors]] and [[color television]]. These devices often reproduce colours using an array of red, green, and blue phosphors agitated by a [[cathode-ray tube]] (CRT), or an array of red, green, and blue [[LCD]]s lit by a backlight, and are therefore naturally described by an additive color model with RGB primaries.

Early examples of RGB color spaces came with the adoption of the [[NTSC]] color television standard in 1953 across North America, followed by [[PAL]] and [[SECAM]] covering the rest of the world. These early RGB spaces were defined in part by the phosphor used by CRTs in use at the time, and the gamma of the electron beam. While these color spaces reproduced the intended colors using additive red, green, and blue primaries, the broadcast signal itself was encoded from RGB components to a composite signal such as [[YIQ]], and decoded back by the receiver into RGB signals for display.

[[HDTV]] uses the [[BT.709]] color space, later repurposed for computer monitors as [[sRGB color space|sRGB]]. Both use the same color primaries and white point, but different transfer functions, as HDTV is intended for a dark living room while sRGB is intended for a brighter office environment.{{citation needed|date=January 2023}} The gamut of these spaces is limited, covering only 35.9% of the CIE 1931 gamut.<ref>{{cite web |last1=Yamashita |first1=Takayuki |last2=Nishida |first2=Yukihiro |last3=Emoto |first3=Masaki |last4=Ohmura |first4=Kohei |last5=Masaoka |first5=Kenichiro |last6=Masuda |first6=Hiroyasu |last7=Sugawara |first7=Masayuki |title=Super Hi-Vision as Next-Generation Television and Its Video Parameters |url=http://informationdisplay.org/IDArchive/2012/NovemberDecember/FrontlineTechnologySuperHiVisionasNextGen.aspx |website=Information Display|archive-url=https://web.archive.org/web/20180210024304/http://informationdisplay.org/IDArchive/2012/NovemberDecember/FrontlineTechnologySuperHiVisionasNextGen.aspx |archive-date=2018-02-10 }}</ref> While this allows the use of a limited bit depth without causing [[color banding]], and therefore reduces transmission bandwidth, it also prevents the encoding of deeply saturated colors that might be available in an alternate color spaces. Some RGB color spaces such as [[Adobe RGB color space|Adobe RGB]] and [[ProPhoto RGB color space|ProPhoto]] intended for the creation, rather than transmission, of images are designed with expanded gamuts to address this issue, however this does not mean the larger space has 'more colors". The numerical quantity of colors is related to bit depth and not the size or shape of the gamut. A large space with a low bit depth can be detrimental to the [[Color space#RGB density|gamut density]] and result in high <math> \Delta E </math> errors{{Explain|reason=Please define delta-E|date=January 2023}}.

More recent color spaces such as [[Rec. 2020]] for UHD-TVs define an extremely large gamut covering 63.3% of the CIE 1931 space.<ref>{{cite web |last1=Baker |first1=Simon |title=The Pointer's Gamut - The Coverage of Real Surface Colors by RGB Color Spaces and Wide Gamut Displays |url=https://tftcentral.co.uk/articles/pointers_gamut |website=TFTCentral |access-date=13 January 2023 |language=en |date=19 February 2014}}</ref> This standard is not currently realisable with current LCD technology, and alternative architectures such as [[quantum dot]]<ref>{{cite journal |last1=Chen |first1=Haiwei |last2=He |first2=Juan |last3=Wu |first3=Shin-Tson |title=Recent Advances on Quantum-Dot-Enhanced Liquid-Crystal Displays |url=https://ieeexplore.ieee.org/document/7809081 |journal=IEEE Journal of Selected Topics in Quantum Electronics |pages=1–11 |doi=10.1109/JSTQE.2017.2649466 |date=September 2017|volume=23 |issue=5 |bibcode=2017IJSTQ..2349466C |s2cid=1400159 }}</ref> or [[OLED]]<ref>{{cite journal |last1=Huang |first1=Yuge |last2=Hsiang |first2=En-Lin |last3=Deng |first3=Ming-Yang |last4=Wu |first4=Shin-Tson |title=Mini-LED, Micro-LED and OLED displays: present status and future perspectives |journal=Light: Science & Applications |pages=105 |language=en |doi=10.1038/s41377-020-0341-9 |date=18 June 2020|volume=9 |issue=1 |pmid=32577221 |pmc=7303200 |bibcode=2020LSA.....9..105H |s2cid=235470310 }}</ref> based devices are currently{{When|date=March 2025}} in development.