Expand the Brush tool bar by tapping on . Then click on the color wheel to open the Color Palette. You can adjust colors from here.
Personalize your color selections: You can add frequently-used colors to your selections by tapping on . Tap on “+” to add, and “-“ to delete the color(s) you don’t want.
HSV Color Scheme: Switch between your personalized color selections and HSV color scheme by tapping on and .
Eyedropper: Tap on to pick up any color on the canvas. Simply aim the center of the eyedropper on the color you like and continue drawing.