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Re: CSS3 Color Comments: Clarification of hsl() hue parsing

From: David Woolley <david@djwhome.demon.co.uk>
Date: Thu, 13 Mar 2003 07:24:17 +0000 (GMT)
Message-Id: <200303130724.h2D7OHl01860@djwhome.demon.co.uk>
To: www-style@w3.org

> 
> DW>  This seems to give HSL a smaller gamut than
> DW> sRGB.
> 
> It has the exact same gamut as sRGB.

The way I read the description of sRGB is that it is clipped in
device space (with the possible implication that clipping is dependent
on the values of components other than that being clipped), whereas 
what seems to be being said here is that clipping occurs in HSL space.

Maybe the description of sRGB clipping needs to be clarified, as it
it appears to imply that values outside [0,100] are have a meaning
other than their clipped values.

> All light sources stimulate the optic nerve. Not sure what you are
> trying to say here. Are you referring to additivity?

But if you only add three components, the cross talk between receptors
means that you will never be able to get all combinations of output
from the three types of receptor.

THe reference to light sources was because the colour of dye based
reflective systems depends on the detailed spectrum of the illuminating
source, making a source, where everything is controlled a simpler case.
Received on Thursday, 13 March 2003 02:24:21 GMT

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