Choosing a set of colors to live with on a day-to-day, look-at-all-of-the-time level is a tricky thing to do. It's the reason color systems appeared, to make it all a bit less imposing, and so we can easily work out what goes beautifully with what.
The color wheel in interior design is the most prevalent of the color organizing models, famously splitting hues into warm and cool tones and helping us to see how colors complement each other — and since it’s been around for hundreds of years (thanks, Sir Isaac Newton) it can sometimes be hard to think of reds, yellows, purples, and greens in any other way than a divided-up rainbow disc.
