I’ve started schooling myself in using color recently, and this was one of the first test images I made.
I used to do it on gut feeling mostly, like I do with perspective – I mean I know things about bounce light and indirect shadows and color temperature, but when I have a bunch of colors that don’t work well together I didn’t really know why.
So I started watching Sycra and Ctrl+Paint videos again to get a handle on some kind of technique. And the biggest shift in my thinking came when I installed a color wheel for Photoshop. I use Coolorus, and once you learn how to use it it’s a great tool.
I recommend these videos on the subject if you want to learn too.