- From: Alan Gresley <alan@css-class.com>
- Date: Sat, 11 Jan 2014 22:50:59 +1100
- To: CSS 3 W3C Group <www-style@w3.org>
- Message-ID: <52D13023.8020203@css-class.com>
Hello all, I believe there is an error with 'issue 2' in §6 [1] of CSS4: | Issue 2: gray() should have a keyword arg that opts | it into smarter modes. Should *arg* be *argument*? Also there is the following: | #757575 is the gray that lives exactly between | white and black, in contrast-ratio space. Should #757575 be #797979 or #808080? If this was to become non normative text, you would have to further explain contrast ratio and why #757575 is not halfway. Also there is the following: | Taking 0% to be black, 100% to be white, | and 50% to be #757575, you convert between | contrast-ratio space and luminance space with | L = 21^p, then find the gray with that luminance. Why is there 'contrast-ratio space' instead of just 'contrast ratio'? Would contrast-ratio depth be more appropriate since the contrast ratio is relating to color depth (deep color)? It's not tied to a particular color-space but more to do with the contrast ratio of a display device. Should 'luminance space' be replace with 'relative luminance' [2]? You can have relative luminance in colorimetric spaces and I believe this is what these words are attempting to be convey. 1. http://dev.w3.org/csswg/css-color/#grays 2. http://en.wikipedia.org/wiki/Luminance_%28relative%29 Alan P.S. Though off-topic for this list, the color table for §4.2 Examples of HSL colors and §5.2 Examples of HWB Colors are broken. See attached screenshot 'hsl.png'. It looks better with .color-table {width: 300%;}
Attachments
- image/png attachment: hsl.png
Received on Saturday, 11 January 2014 11:51:27 UTC