"Aqua" is a pale blue-green colour. Aqua is one way to describe the colouration that is seen. Colour description is totally a subjective one. Me, I refrain from using the name 'aqua', and describe it a bluish-green, but that is me. Like I said, totally subjective. But as you allude to, colours are certainly not vivid, well, unless you have a 40" scope...
To make matters worse, 1/3 of all males are colour blind to some degree, from bugger all to nearly no colour rendition at all. Females are few who experience any degree of colour blindness.