https://www.smashingmagazine.com/2016/04/web-developer-guide-color/

Since redesigning my site is one of my back-burner projects, I’ve procrastinated by reading an unnecessary amount of articles about color schemes and color theory. So many articles about color in web design focus on color psychology, and in essence try to pass broad principles off as nuts-and-bolts advice. The above link is a practical guide.