Site Palette - Get the essential colours from any website
Who Can Use - WhoCanUse is a tool that brings attention and understanding to how color contrast can affect different people with visual impairments.
Color Palette Generator - Enter the URL of an image and find its color palette
Colour Contrast Analyser - TPGi's ADA Color Contrast Checker checks for helps determine the accessibility the contrast ratio of two colors for WCAG AA and AAA.
Kontrast - Check and adjust web element contrast in real time.
Koa11y - Automatically detect accessibility (a11y) issues on webpages