A NSW Government website
 

Greens can create a peaceful, relaxed setting and feel either warm or cool depending on the undertones. They are very versatile and can be used in any space both interior and exterior. Greens can be deep and dark, as well as bright and lively and can be combined with other hues to produce teals, citrus shades or lime.

Generally, green conveys an image of health and vigor. Science actually backs up this impression with many studies implicating green in favorable outcomes. For example, people who spent time in nature surrounded by green vegetation – a practice the Japanese call 'forest bathing' – had lower blood pressure than those who did not.

Green-winged bird in tree