peacock blue 
noun [mass noun]
A greenish-blue colour like that of a peacock’s neck.Blueberry would have a more of reddish/purple undertone and peacock blue has a yellowy/green undertone....
- With colours like hazel grey, peacock blue, glacier white, tangerine mist, thunder black and ecstasy purple and a brand name like Fiat it ought to get noticed.
- As a permanent fixture, a classic bench in a sophisticated colour, such as putty, peacock blue or cinnamon, would look superb in a sober setting such as a yew, hornbeam or beech enclosure.