But what about the definition of aqua outside of any digital color space?
I feel like using only RGB values to define 'aqua' is a bit reductive as it is merely a specification in a specific environment trying to render a type of color but with inherent limitations such as not being able to reproduce the whole spectrum, color accuracy on the display, etc. etc. there's a lot of other parameters along with your own individual color perception that goes beyond "it's equal values blue and green within the RGB color-space"
But then as I list all these things I think I arrive at the same conclusion as you, it feels like a dumb false choice haha
I feel like you're missing the forest for the trees. Outside of any digital color space, aqua is still defined as "blue green" in plain English - I just used the CSS RGB definition as an example where it's literally defined as just equal parts blue and green.