The most important lesson to learn here is that unless you’re absolutely certain that somebody with colour blindness can differentiate between the colours you have chosen, then you should never use colour alone to indicate something important. Where possible, use icons, text, shapes, textures or other visual cues as well as colour when communicating information to users.
There are many ways to test for accessibility, however these tools aren’t always fully accurate – ultimately the best way to see if your design is suitable is to perform real UX audits. It’s likely that you know somebody who is colour blind, why not get them to review your design?
What we see as designers and developers isn’t always what your users see; they could be colour blind, using a screen reader or looking at your website on a 3″ smartphone from 2007. Creating websites that are accessible to everyone is essential, and should be part of any good design process.
If you would like to speak to us about your new project and how we ensure we always deliver the ultimate, accessible user experience, please get in touch.