RGBlind.com is described as 'Free, browser-based color blindness simulator and testing platform. It lets you preview images and websites for different types of color vision deficiency, run adult and kids Ishihara tests, and apply color correction—all in your browser' and is an website in the os & utilities category. There are five alternatives to RGBlind.com, not only websites but also apps for Mac, Windows and Linux. The best RGBlind.com alternative is DaltonLens, which is both free and Open Source. Other great sites and apps similar to RGBlind.com are Color Oracle, Sim Daltonism, Color Blindness Simulator and Coloursimulations.