How to pick the least wrong colors

I’m a self-taught designer. 1 This has its upsides: I learn at my own pace (in my case, slowly over decades and counting), I design my own curriculum, and I don’t have to do any homework or pass any tests. But it also has a serious downside: because I don’t have to learn anything, I skip the things that intimidate me. That’s why, for years and years, I’ve avoided learning much of anything about color. But recently I picked up a pet project that forced me to fill in the gaps in my own knowledge. In the cours