A colour-blind simulator and contrast checker for Sketch. Stark is a Sketch plugin that helps you keep accessibility in mind when designing your apps. The preview window lets you see how your design looks for those who don’t see the way a typical person does. You can select from 8 different colour profiles to simulate the various forms of colour-blindness, or use the contract checker to ensure your colours, visuals and typography provide the best readability, legibility and contrast.