In the Seven theme, links which occur inside of surrounding non-link text are coloured blue, but have no other indication that they are a link. This is a WCAG 2.0 failure, specifically F73: Failure of Success Criterion 1.4.1 due to creating links that are not visually evident without color vision.
Normally browser underline links, which allows them to stand out against surrounding non-link text, without relying solely on colour. Seven removes this default underline, causing WCAG failure F73.
Browsers also have default link focus styles, which surround the link on all sides. We've overridden this, and use a solid underline to indicate focus. This means our focused-links look like default browser style for UN-focused links, which could be a bit confusing. Especially since our links use a blue colour close to the default browser link colour.
Update the link styles for Seven theme:
Affected text blocks are include:
admin/modules, screenshot in comment #6).admin/config/development/maintenance has two links inside it, screenshot in comment #8)admin/help/* pages (screenshot in comment #9),admin/reports/status (screenshot in comment #10),admin/modules/install (screenshot in comment #11),Note, we don't need to update link styles which occur outside of surrouding text, such as the toolbar. It would be a good idea to improve their focus styles to a four-sides outline instead of using underlines, but that's outside the scope of this WCAG failure issue.
Updates link styles in Seven theme, to fix an explicit WCAG 2.0 failure.
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Needs work
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Code
It affects the ability of people with disabilities or special needs (such as blindness or color-blindness) to use Drupal.
It involves the content or handling of Cascading Style Sheets.
The patch will have to be re-rolled with new suggestions/changes described in the comments in the issue.
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