Grass looks green because it contains chlorophyll , the pigment plants use to capture sunlight for photosynthesis. Chlorophyll absorbs mostly red and blue light, while green light is reflected back to your eyes, so the grass appears green.

Quick Scoop

In simple terms, grass is green because of how its leaves handle light. The green you see is the light that chlorophyll does not absorb.

Why it matters

Chlorophyll is not just a color source; it helps grass turn sunlight into energy for growth. That is why healthy, actively growing grass often looks especially vivid green.

Extra note

Grass can look pale, yellow, or brown when it has less chlorophyll, such as during stress, low light, or seasonal changes.

TL;DR: grass is green because chlorophyll absorbs red and blue light and reflects green light.