Click the Brush tool.
Click the brush size and shape.
In the color box, click the color you want to use.
Hold down the mouse button and drag across the page to "paint" with the brush.
There are many ways to add color to a drawing. One way is to use the Brush tool to add paintbrush-style strokes to your image.
Brush Styles
You can select from different brush styles including angled brushes, pointed brushes, or brushes with squared tips.
Spray Paint
To get a spray-paint effect on the drawing area, use the Airbrush tool.