Bug 51844

Summary:	CSS3 gradients should interpolate premultiplied colors
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	argyle, gilmoreorless, igor.oliveira, webmaster
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	PC
OS:	OS X 10.5

Description Simon Fraser (smfr) 2011-01-03 12:03:35 PST

The spec <http://dev.w3.org/csswg/css3-images/#gradients> says that interpolation should be in premultiplied color space, which we don't implement (and is not possible to do in CG).

Comment 1 Adam Argyle 2020-07-07 16:23:18 PDT

I've noticed this greyish effect in Safari across a few project. It can be worked around if noticed and appropriately adjusted in the CSS, but until today had never understood why. Wanted to share the project I was using to test the effect (https://codepen.io/argyleink/pen/KKVoboe), and mention that example #23 in the spec talks about this effect as well.