Color Selecting Box

The Color box in the Tools panel displays the current foreground / background colors and calls the Color Picker.

To adjust the foreground color, click on the Foreground square and tune the color in the Color Picker.
To adjust the background color, click on the Background square and use the Color Picker.
Also, you can adjust the current color in the Color palette.
Click the Switch Colors icon on the Toolbox to swap the foreground and background colors
To restore the default foreground and background colors (black and white) click the icon (movie).