![]() relative to perception), Euclidian distances require a perceptually uniform Cartesian vector space such as CIELAB. The IEC standard for sRGB specifies a threshold of 0.04045 it is NOT 0.03928 (that was from an obsolete early draft).HSV and HSL are not even remotely accurate in terms of perception.Perceived lightness (L*) is nonlinear as is human perception.Luminance (L or Y) is linear as is light.sRGB must be LINEARIZED before applying the coefficients.The only answers that are accurate are the and answers, and in support The other answers (including the accepted) are linking to or citing sources that are either wrong, irrelevant, obsolete, or broken. The "Accepted" Answer is Incorrect and Incomplete ![]()
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