Drawer elements in the color theme editor lack contrast

The elements in the drawer in the iframe on the tests lack contrast:

WCAG warnings in the test class [org.xwiki.flamingo.test.ui.FlamingoThemeIT]:
Validation in the test method [validateColorThemeFeatures]
Check for [org.xwiki.test.ui.po.ViewPage] at http://xwikiweb:8080/xwiki/bin/view/FlamingoThemes/validateColorThemeFeatures.
Found [3] items

1: Elements must have sufficient color contrast
Description: Ensures the contrast between foreground and background colors meets WCAG 2 AA contrast ratio thresholds
Help URL: https://dequeuniversity.com/rules/axe/4.6/color-contrast?application=axeAPI
Help: Elements must have sufficient color contrast
Impact: serious
Tags: cat.color, wcag2aa, wcag143, ACT

HTML element:
<li class="drawer-category-header"><hr class="hidden">Home</li>
Selector: iframe, .drawer-category-header
Fix any of the following:
Element has insufficient color contrast of 1.43 (foreground color: #4d4d4d, background color: #cc0000, font size: 12.6pt (16.8px), font weight: normal). Expected contrast ratio of 4.5:1

HTML element:
<span class="drawer-menu-item-text">Administer Wiki</span>
Selector: iframe, #tmAdminWiki > .drawer-menu-item-text
Fix any of the following:
Element has insufficient color contrast of 3.15 (foreground color: #333333, background color: #ff0000, font size: 10.5pt (14px), font weight: normal). Expected contrast ratio of 4.5:1

Two types of contrast violations happen (see above).