<https://forum.reapermini.com/index.php?/topic/51585-reaperites-i-give-you-my-colour-comparator-spreadsheet/#comment-769915>
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"My spreadsheet only intends to communicate the mathematical similarity between colours. It doesn't pretend to be able to represent those colours accurately on a screen.  As you pointed out, that's a whole other bag of cats.  Your point remains valid though, because there's no given guarantee that the colours were accurately represented to begin with. \n  \nI tried to account for that, and graded the matches, with a fairly wide berth given for error (except perfect matches, which use the hard 2.3 value given by the CIE).  Given the math is perfect, this should account for error introduced when brand XYZ decided to upload it to the interwebs.  The marketing guy likely just said \"good enough\" and slapped it up there, so even colours that are graded as \"mediocre matches\" in my spreadsheet could very well be perfect matches when you go to paint with them, and, by equal token, they could be right out.  YMMV.  My hope was that anything that was listed as a \"good match\" would at least be passable. \n  \nI don't think anyone would be daft enough to blame me, but I'll add a disclaimer that I'm not responsible for the wide variety of reasons why your colours may not match once you get them. \n"
<https://forum.reapermini.com/index.php?/topic/51585-reaperites-i-give-you-my-colour-comparator-spreadsheet/#comment-768885>