Bug 304249

Summary: REGRESSION (Safari 26.2): Color font affects the color of other DOM elements
Product: WebKit Reporter: Dan <dan>
Component: TextAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: ap, fantasai.bugs, thomas.guillory, vitor.roriz, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 26   
Hardware: Mac (Apple Silicon)   
OS: macOS 15   
See Also: https://bugs.webkit.org/show_bug.cgi?id=281739
Attachments:
Description Flags
Simplified test case
none
The color font (Coral Pixels, OFL License) none

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. ***
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