What color( composition)s qualify good UX for a wiki, or any similar informative site?

I have a wiki site I use for gathering and sharing knowledge and information. It has a completely built-up and detailed theme that is very similar to the design of the original Wikipedia (it's called Flannel Ocean if anyone knows it) - the choice of my decision was its well-known shape that provides transparency and doesn't alienate users.

Though, all those white and very mild pale colors feel very featureless and blank for me. I desire to grab attention, to make the site much more appealing by new color choices.

What should I consider during the selection of colors? Do general tips I've got in other art fields (e.g. be very careful with using colors of high saturation, etc.) apply here?