[nkrisc]

More like being able to naturally parse the base 16 value without thinking about it, just like you can parse which of these numbers is bigger without thinking: 4 8

And then having a natural intuition for how the relative mixing of color values should look.

I’d say you could do pretty well if you took your time and thought analytically about it, but some people have just developed a strong intuition for it.

This would be much harder if there was a “none of the above” option.