I Usually Wear A Yellow Coat. I Usually Have A Dark Head. I Make Marks Wherever I Go. What Am I?

Riddle: I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go. What am I?

Answer: A pencil.

Source: https://www.riddles.com/478

Riddle: I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What am I? Answer: A pencil. — by Anonymous v1.

Riddle: I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
What am I? Answer: A pencil. — by Anonymous v2.