Designing for accessibility is about creating experiences that can be enjoyed by as many people as possible. Picking the right colours means that we can make elements of the user interface (UI) more comfortable to view for the masses. In the UK alone there are almost 2 million people living with sight loss, and approximately 3 million people with colour blindness. Even when we create design systems it’s important to take colour choices seriously because getting it wrong can exclude people who would otherwise become future customers.