Shade - Super easy color contrast insights and recommendations
Fix contrast - Automatically fix contrast issues on all websites
Contrast - A macOS app for quick access to WCAG color contrast ratios
Color Contrast Cool - Tool to check color contrast as per in dev WCAG 3 APCA
Colour Contrast Checker - Check the contrast between different colour gainst WCAG
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!