'aquagreen' originates from Modern English as a compound of 'aqua' and 'green', where 'aqua' comes from Latin 'aqua' meaning 'water' and 'green' from Old English 'grēne' meaning 'green'.

'aqua' entered English via Latin (and Medieval/Scientific Latin) as a form meaning 'water', while 'green' evolved from Old English 'grēne'; the compound 'aquagreen' is a modern formation combining these elements to name a color.

Initially a literal compound meaning 'water-green' (green like water); it is used in modern English primarily as a color name or descriptive adjective for that tint.