Add the [shift] modifier for more color options in Illustrator

The Control panel offers you an array of choices at your fingertips. For example, the Fill and Stroke option boxes have pop-up menus, which each give you a mini Swatches panel from which you can choose colors. Want even more choices? Press and hold [shift] when you click either of these two option boxes and Illustrator will display the Color panel with mixing options based on your document’s color space.