Aqua is a variation of green
Green is the colour most commonly connected with nature and ecology.
It is used for money, prosperity, employment, fertility, self-knowledge, protection, healing, growth, youth, hope, spring, happiness, abundance, idealism, honour, immortality, balance, luck, calmness, love and personal appearance.
It symbolises: the Green Man; the Element Earth; the planets Venus and Mercury; gods and goddesses of vegetation and/or the forest; the day Friday; and the Zodiac sign Cancer.
Green is the colour we connect with our planet's fertility (it's the colour of chlorophyll), new beginnings, agriculture, and ecological magic.
The Norse saw it as organic life as well as the passage between worlds. It is also used in spells to improve the weather and when combined with silver and/or gold for financial gain.