Robert Chapin

Input fields on the WordPress admin screens have been nearly invisible since version 2.7. The problem was so severe that Matt suggested I make a plugin to override core CSS values for anyone who wanted more contrast. Following community feedback, I created this extra plugin specifically for high contrast.
This plugin adds Admin Color Scheme options that dramatically change the appearance of form fields, table rows, and background colors in the admin pages. It is not intended to follow the design principles of the built-in style sheets. If this is too much for your needs, then also consider my plugin with more subtle effects called <a href="https://wordpress.org/plugins/fix-admin-contrast/" rel="ugc">Fix Admin Contrast</a>

High Contrast Admin

Adds admin color schemes for the visually impaired.

2fox4oliver

2fox4 Accessibility Suite adds a floating accessibility widget to your WordPress site, giving visitors control over how they experience your content.
Features:
<ul>
<li>Font Resizing — Adjustable from 80% to 200% with a smooth slider.</li>
<li>Dyslexia-Friendly Font — Switches body text to OpenDyslexic with increased spacing.</li>
<li>High Contrast Mode — Increases contrast across the page.</li>
<li>Dark Mode — Inverts to a dark colour scheme.</li>
<li>Reading Guide — A horizontal bar follows the cursor to help line tracking.</li>
<li>Highlight Links — Outlines and underlines every link on the page.</li>
<li>Keyboard Navigation — Enhanced focus rings for keyboard users.</li>
</ul>
Design:
<ul>
<li>Apple-inspired glassmorphism aesthetic with SF Pro font stack.</li>
<li>Fully responsive; works on mobile, tablet, and desktop.</li>
<li>Respects <code>prefers-reduced-motion</code>.</li>
<li>All settings persist via <code>localStorage</code> between visits.</li>
</ul>
Internationalisation:
<ul>
<li>Automatically detects browser language (<code>navigator.language</code>).</li>
<li>Ships with English and German translations.</li>
<li>Fully translation-ready with WordPress i18n functions.</li>
</ul>
Backend:
<ul>
<li>Settings page under Settings > 2fox4 Accessibility.</li>
<li>Customise accent colour and widget position (bottom-right / bottom-left).</li>
</ul>

2fox4 Accessibility Suite

A professional WCAG 2.1/2.2 accessibility toolkit with a floating widget for font resizing, contrast modes, reading guide, and more.

High Contrast Admin vs 2fox4 Accessibility Suite