riddle for 1 rophy

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?
be quick and get a trophy.

hi. Is the answer dust?

A shadow 

Is it correct?

kiwi143 is right the answer is shadow and sry guys i told u the answer very late

kiwi143 will get the trophy bro

I am not a boy I am a girl

Ok thanks for the trophy