https://drafts.csswg.org/css-backgrounds-4/#background-clip

The current values as defined in

<bg-clip> = box | border | text 

and as noted by @gsnedders on w3c/csswg-drafts#5604

the -webkit-background-clip and background-clip should have the same values per discussion on w3c/csswg-drafts#4839

What would need to be checked?

• the differences in values between compat, CSS background clip, CSS-4 background-clip
• the state of implementations. chrome for example is the only browser not having an unprefixed version of -webkit-background-clip: text
• the state of the Web on usage (optional)
• eventually create a PR