I am only one ......What am I???

Question

I am only one color, but not one size.
Though I'm chained to the earth, I can easily fly.
I am present in sun, but not in rain.
I do no harm,I feel no pain.
What am I?

Answer 1

Sunrays

They in one color and no size, present in sun and not in rain.

Comments

not in one size , do u still think its sunrays!