Adobe Illustrator CC Classroom in a Book (2019 Release), First Edition

Drag in the color field (where you see the circle in the following figure). As you drag right and
left, you adjust the saturation, and as you drag up and down, you adjust the brightness. The
color you create when you click OK (don’t yet) appears in the New color rectangle, an arrow is
pointing to it in the figure. Don’t worry about matching the color in the figure yet.