RESOLVED FIXED304249
REGRESSION (Safari 26.2): Color font affects the color of other DOM elements 
https://bugs.webkit.org/show_bug.cgi?id=304249
Summary REGRESSION (Safari 26.2): Color font affects the color of other DOM elements
Dan
Reported 2025-12-16 06:25:20 PST
In Safari 26.2 macOS, using a specific color font for the page heading affects the rendering of subsequent DOM elements. The effect can be mitigated by using the `isolation: isolate` CSS property on the heading. The issue was not present, as far as I remember, on Safari 26.1.
Attachments
Simplified test case (806 bytes, text/html)
2025-12-16 06:26 PST, Dan 		no flags
Details
The color font (Coral Pixels, OFL License) (615.81 KB, application/octet-stream)
2025-12-16 06:28 PST, Dan 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Dan
Comment 1 2025-12-16 06:26:13 PST
Created attachment 477747 [details] Simplified test case
Dan
Comment 2 2025-12-16 06:28:05 PST
Created attachment 477748 [details] The color font (Coral Pixels, OFL License) The font is a version of Coral Pixels, a font licensed under SIL OFL, available at: https://github.com/tanukifont/Coral-Pixels
Alexey Proskuryakov
Comment 3 2025-12-16 10:43:54 PST
Thank you for the report! This reproduces with Safari Technology Preview in macOS 26.1, and does not reproduce with built-in Safari. So, rather surprisingly, this is a WebKit regression, not an underlying framework one.
Radar WebKit Bug Importer
Comment 4 2025-12-16 10:44:02 PST
<rdar://problem/166631312>
Alexey Proskuryakov
Comment 5 2025-12-17 10:55:02 PST
*** Bug 304334 has been marked as a duplicate of this bug. ***
Simon Fraser (smfr)
Comment 6 2026-01-05 15:47:51 PST
Test at https://codepen.io/Rik/pen/GRVmMRj
Alexey Proskuryakov
Comment 7 2026-01-05 15:56:28 PST
Does this affect any production websites? I assume so, given that this got quickly noticed by multiple people, but a clear confirmation would be helpful.
thomas.guillory
Comment 8 2026-01-06 00:25:54 PST
One example : this affects this chat app, based on Tauri.app which use wkwebview: https://github.com/tchapgouv/tchap-desktop/issues/145
Dan
Comment 9 2026-01-06 01:48:08 PST
I’ve seen it in the header for https://livelaugh.blog/, which now uses `isolation: isolate` to fix the issue.
Nipun Shukla
Comment 10 2026-01-06 13:55:40 PST
Pull request: https://github.com/WebKit/WebKit/pull/56156
EWS
Comment 11 2026-01-07 22:17:13 PST
Committed 305254@main (66bd20a0579a): <https://commits.webkit.org/305254@main> Reviewed commits have been landed. Closing PR #56156 and removing active labels.
Note You need to log in before you can comment on or make changes to this bug.