There are several threads for green bases around but I shared my bases in the cbox and they seemed to get positive reviews so I present;


Olivine/Oil Slick


Raven

(Dark Countershade)


Lichen/Reindeer Moss

(Light Countershade/solid)


I think the trick to green bases is subtly, try not to think about lime jello lions and more natural and more hinted at the colour green like how ebony have very subtle purples in it.

EDIT:

Link to Olive and Light Olive bases by Teddy Broosevelt (#3704)
Link to Moss base by Africa (#9670)
Link to Jasper/Malacite by Thalath (#41669)
Link to Cake's (#53239) 8+ Pastel bases which includes a green 'grass' base.
Link to Several ambitious green bases by Tambo (#24375)
Link to Grotto a very nice green-blue base with 165+ supports by Hushpup (#90498)
Link to Some spoopy Swampy green bases by Kled (#70699)
Link to some very BRIGHT emerald/jasper coloured bases by Wolfeyrainbows (#74562)
Link to Honeydew by Witchy (#91914)

Ideas for colours:
Spinifex, a golden-green base suggested by Brighty (#22310)