This is a bit of a trick question! While grass blades reflect green light, they don't actually have a color "by nature".

Here's why:

* Pigment: Grass doesn't have green pigment like many plants. It has a pigment called chlorophyll, which is primarily responsible for absorbing light energy for photosynthesis. Chlorophyll absorbs most colors except green, which it reflects back.

* Reflection: The green light that we see is what's left over after the chlorophyll absorbs the other wavelengths. It's not actually a color that the grass itself "possesses" in the way a blue object has blue pigment.

So, to be precise, grass isn't inherently any particular color. It appears green because of the way chlorophyll interacts with light.