I think you're noticing the "soap opera effect" which is caused by increasing the frame rate with motion interpolation. You can normally find a way to turn it off.
I've been told that more than once, but I don't think that avoids the "perfect colours" effect.
People in here seem not to understand that some of the colours not displaying perfectly or a colour "merging" into its neighbouring screen colour is a feature, not a bug. I do not want to see all the pixels and all the colours on the screen as they are, it's as simple as that.
https://whatis.techtarget.com/definition/soap-opera-effect-m...