Vitaly Friedman writes: “Too often, accessibility is seen as a checklist, but it’s much more complex than that. We might be using a good contrast for our colors, but if these colors are perceived very differently by people, it can make interfaces extremely difficult to use. Depending on our color combinations, people with color weakness or who are colorblind won’t be able to tell them apart. Here are key points for designing with accessibility for colorblind users in mind.”