[ADDED]
4 Shades of Grass (they are all a Shade of Green).
The Grass doesn’t spread, get eaten, need Light, spawn Mobs nor change its color because Biome.
It is crafted with 8 pieces of regular Grass (use a Spade for Silk Touching it) and a Dye (Green, Lime, Black or Light Gray). Also possible in the Bathing Pot to save on Dyes.
Thank you!