Most product designers and developers have NO idea how to handle this properly. I'd done a poor job of it until around 15 years ago, when I was spec'ing out th

Most product designers and developers have NO idea how to handle this properly. I'd done a poor job of it until around 15 years ago, when I was spec'ing out the UI for utility-scale solar monitoring web app. It turns out that in doing that, I discovered my hardware counterpart on the project was colorblind (red/green). We rebuilt the UI using principles from an old Rand Corp study from the 1960s, some of Tufte's work, and the Carolyn Brewer's truly excellent ColorBrewer web app (https://colorbrewer2.org/ https://colorbrewer2.org/), which is the single best tool I know for sorting out how to use color more effectively for info visualization. (Despite what the page says, it's for way more than cartography - I've used ColorBrewer to help refine nearly a dozen IoT data visualization apps over the years. Highly Recommended.