Contrast
A macOS app for quick access to WCAG color contrast ratios
Koa11y
Koa11y is a desktop app that allows you to automatically detect accessibility (a11y) issues on webpages.
Accessible Color Generator
A tool for crearting color variations on a base color to meet WCAG AA or AAA color contrast ratio guidelines.
Accessible Color Generator - Learn UI Design
Colorblindly
Colorblindly is an extension that helps developers create websites for the people with colorblindness by allowing them to simulate the experience those users have on websites.