Re: Re: Re: to generate a set of well contrasted colors

Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
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...but those are for the sRGB primaries in linear space; css/HTML codes are in gamma space.

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Re: Re: Re: Re: to generate a set of well contrasted colors by Everlasting God (Beadle) on Nov 08, 2003 at 01:51 UTC
D'Oh! Right you are. That should have said Y' = etc. That gives Luma, which is plenty close enough to actual Lightness (which is what this calls for, not Luminosity that Y is stands for) for this application. 'The fickle fascination of and Everlasting God' - Billy Corgan, The Smashing Pumpkins	[reply]