This is honestly much better than Trueno's colorset. I still prefer mine by far (the current version has yet to be posted), but at least you have room for tons of grass colors.
By the way, vary the greens in the green column. The first 5 look like they're the same hue of green, but at different shades. Try adding more blue to some for teal grass, and for the others, more red for olive grass.