Ishita Ray

Accessibility Toolbar adds a floating button panel to any WordPress website, letting users: 
– Increase and decrease font size 
– Toggle high-contrast mode for better readability 
– Customize colors from backend settings

ITY Accessibility Toolbar

Adds a simple accessibility toolbar for changing font sizes and toggling high-contrast mode.

Robert Chapin

Input fields on the WordPress admin screens have been nearly invisible since version 2.7. After a year of hacking CSS files to work around this problem, Matt suggested I make a plugin to override core CSS values. This plugin does just that.
Fix Admin Contrast now also corrects white point issues on iPad and similar displays. Without this plugin, the administrative table colors can look the same as the background color.
If you need even more contrast, consider my plugin called <a href="https://wordpress.org/plugins/high-contrast-admin/" rel="ugc">High Contrast Admin</a>

Fix Admin Contrast

Improves the visibility of administrative form fields and tables.

ITY Accessibility Toolbar vs Fix Admin Contrast