A datapack + Resourcepack Combination that changes petrified oak slabs into grass slabs!
As it is an add-on to my main resourcepack PolyStash, the grass colours are those of that pack.
Other resource packs that change grass colour are incompatible, as the colour of the slabs and the surrounding grass will not match.
You can mine the grass slabs with a shovel as expected, but they will make a stone breaking sound as it is impossible to change this without mods.