1964772 - Light Mode Theme: Visited link color does not pass contrast with Night Sky HCM

Status: NEW

(Core :: Machine Learning, defect)

Description

[Natalie Stroud [:nstroud]]

Attachment: Nightly with the Link Preview opened in Windows HCM Night Sky - visited links are outlined with a red box

Prerequisites:

Found on 140.0a1 (2025-05-05) (64-bit)
Night Sky HCM is turned on
Light Mode theme is turned on in Firefox

STR:

Please note: it is important to turn HCM on first and then open Firefox. Otherwise, you may be unable to replicate the issue. Ensure the Mozilla VPN app is open before completing these steps.

1. Turn on Night Sky in Windows HCM
2. Open Nightly
3. In this step you can find any link. I chose to go to Google Scholar and search 'accessibility'
4. Press Shift + Alt to get the Link Preview to appear. This will show the default HCM styles
5. Click any link inside of the Link Preview. Then return to the page with the Link Preview and observe the hovered HCM style

Actual:

For the visited link, the text color is #80ff80 on a white background which fails contrast guidelines. The contrast ratio is 1.27:1

Expected:

The visited link color should meet a color contrast ratio of at least 4.5:1 per WCAG SC 1.4.3 Contrast (Minimum)

Comment 1

[Natalie Stroud [:nstroud]]

Attachment: IGNORE

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field for this bug is set to S3. However, the accessibility severity is higher, .
:tarek, could you consider increasing the severity?

For more information, please visit BugBot documentation.

Comment 3

[Natalie Stroud [:nstroud]]

ticket updated to reflect color contrast issue found in Windows Night Sky HCM under Light Mode Theme in Firefox