When creating a mention, a grey block is added to the content, with the name of the user mentionned being a link in dark blue.
The contrast inside the mention is not high enough, and it was reported in the wcag automated testing:
{noformat}
```
WCAG warnings in the test class [org.xwiki.mentions.test.ui.AllIT]:
__________
Validation in the test method [documentBody]
Check for [org.xwiki.test.ui.po.ViewPage] at [ http://xwikiweb:8080/xwiki/bin/view/NestedMentionsIT/documentBody/ ] .
Found [2] items
1 items1 : Elements must meet minimum color contrast ratio thresholds
Description: Ensures the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds
Help URL: https://dequeuniversity.com/rules/axe/4.8/color-contrast?application=axeAPI
Help: Elements must meet minimum color contrast ratio thresholds
Impact: serious
Tags: cat.color, wcag2aa, wcag143, TTv5, TT13.c, EN-301-549, EN-9.1.4.3, ACT
HTML ACTHTML element:
<a class="xwiki-mention user" data-reference="xwiki:XWiki.U2" href="/xwiki/bin/view/XWiki/U2" id="test-mention-1">@U2</a>
Selector: [# test-mention-1 ]
Fix any of the following:
Element has insufficient color contrast of 3.33 (foreground color: #2f70a7, background color: #cecece, font size: 10.5pt (14px), font weight: normal). Expected contrast ratio of 4.5:1 {noformat}
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