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DownloadThe RGB color space cannot always produce a color equivalent to any wavelength. In order to produce these colors the red component sometimes should be negative. To address this problem the CIE in 1931 defined a new color space, called XYZ that can produce every color with positive tristimulus values.
| RGB | CMY | CMYK |
| HSI | HSV | L*a*b |
| XYZ | YIQ | YUV |
