A Green Mule

A green, colored Mule, was wandering along,
humming the melody of a beautiful song.
As he wondered, mostly out loud,
should I join up with a crowd
of people or other just like me?
Not with people as I won't fit in.
It will be with Mules; they are my kin.
What about the green shade of your skin?
Color only matters to people, there in.