Well it largely depends on what the rest of everything else will look like ... The colors may either clash or blend. Which is really the biggest concern when it comes to basic grass, besides how repeated the texture looks.
That said, I don't know how ... GRASSY that really looks. It looks more like a fabric pattern to me. The dark "blades" of grass stick out like a sore thumb against the low-contrast backdrop, and at a glance, it just sort of looks like a messy polkadot pattern. If you hadn't have said it was grass, I would have just said "yep that ... is a pattern"
And don't be afraid to use other hues. Grass is more yellow in its lighter tones, and more blue in its darker shades. It's never a flat green.
In fact, in pixel art palettes, you should NEVER just use one flat color and increase or decrease its tonal values. All colors need to blend into other hues (lighter = warmer, darker = cooler). Otherwise, everything just looks flat & bland.