Two years ago i shared this website where you try and determine when a shade is either blue or green.
Posting it again because lemmy has grown quite a bit since then, maybe we have more people that havent tried it!
I don't know, maybe it doesn't work for people who are used to working with RGB colours.
#00FFF5 is and looks (to me) blueish green, #00F5FF is and looks (to me) greenish blue, anything in-between is up to calibration issues, or turquoise for short.
Maybe I've unwittingly trained myself to judge colours as objectively as possible regardless of what screen they're being shown in, I don't know.
Maybe it would be different with paint, but most computer screens have green pixels and blue pixels (and red ones), and simulate colours using those, so it's relatively easy to tell if it's biasing one way or the other.
Given an RGB screen maybe it'd be better to compare a gradient between, say, cyan and magenta, for instance, which combine different pixel colours.
I don't know, I'm not a neurologist or a colour theorist, just someone who's spent way too much time picking the right RGB values for UIs or documents to look adequate.