Contrast - A macOS app for quick access to WCAG color contrast ratios
Color Safe - Find accessible color palettes based on WCAG Guidelines
Figma Color Search - Search for anything, find a color.
Page Speaker - Modern web accessibility tools for agencies & webmasters
Colour Contrast Checker - Check the contrast between different colour gainst WCAG
Stark for Figma - Contrast Check your designs right within Figma.