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.

wppluginisle

Lightweight, professional accessibility toolbar to help your website meet WCAG standards with ease.
PI Accessibility Toolbar offers a comprehensive suite of tools to improve website usability for all visitors. This plugin integrates seamlessly into any WordPress theme, providing essential accessibility features without bloat.
<h4>Key Features</h4>
<ul>
<li>Contrast Adjustments: Invert colors, Monochrome mode, Dark Contrast, Light Contrast, Low and High Saturation.</li>
<li>Text Customization: Dynamic Font Size, Line Height, and Letter Spacing adjustments.</li>
<li>Navigation Tools: “Skip Links” for keyboard users and high-visibility focus management.</li>
<li>Visual Aids: Highlight links and “Read Mode” to remove distracting backgrounds/sidebars.</li>
<li>Responsive Design: Works seamlessly on desktops, tablets, and mobile devices.</li>
<li>Admin Customization: Change toolbar colors (background, text, accent) and toggle specific features via a simple settings page.</li>
</ul>

PI Accessibility Toolbar

Lightweight, professional accessibility toolbar to help your website meet WCAG standards with ease.

High Contrast Admin vs PI Accessibility Toolbar