- From: Chris Lilley via GitHub <sysbot+gh@w3.org>
- Date: Wed, 10 Aug 2022 12:13:23 +0000
- To: public-css-archive@w3.org
> Delta-E L* is similar to relative luminance and may have similar pitfalls. I'm interested in this one because it is [what Google Material Design uses](https://material.io/blog/science-of-color-design) (HCT Tone is the same as CIE L*). Also because L* is perceptually uniform (but as @Myndex has pointed out, for large blocks of color not for higher-frequency items like text). However, it seems to give very similar results to WCAG 2.1, except for a few mid-tone colors. To see this, on [the black or white app](https://colorjs.io/apps/blackwhite/): - order by Lightness - enable changes - set number of swatches to 500 or so - choose WCAG2.1 - choose Lstar There are not many differences. > If a desired objective for having many different formulas is for testing to find a better contrast formula, I don't believe incorporation into a core CSS feature is the right way to go. This is why I implemented [several of them in color.js](https://colorjs.io/docs/contrast.html), so people can experiment. So far only APCA is giving good results. -- GitHub Notification of comment by svgeesus Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/7359#issuecomment-1210588000 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Wednesday, 10 August 2022 12:13:25 UTC