Click on a region in the picture to color it in with the selected color. Click on a color swatch in the palette to select a new color. The currently selected color in the palette is indicated by a black rectangle drawn around it. When you click, the point that you're clicking on is at the tip of the arrow or the tip of the pointing finger.
Rubens drawing, Head of a Boy
Peter Paul Rubens (June 28, 1577- May 30, 1640) was a major Flemish baroque painter.