There's a color we all know

Tune: “Old MacDonald Had a Farm”

There’s a color we all know,
G-R-E-E-N.
It’s the color that means “Go!”
G-R-E-E-N.
Oh, grass is green and lettuce is green,
Leaves and spinach and peas are green,
There’s a color we all know,
G-R-E-E-N