colored pen

If you color each square along your route with a colored pen or pencil, it will reveal a hidden image.

He would give her a grade, critique her work and then, in a different colored pen, write something more familiar, asking her to play tennis, or saying he would help her break curfew.

Now it is simple, fast and looser, in pencil or colored pen or both; she finishes drawings in one quick sitting.

A Desk—To correspond with painted furniture; a gray blotter and rose colored pen.