You can change the default colors MoboMath uses for ink, normal text, selected text, the selected region, and the window background.
To change MoboMath's default colors:
Choose Preferences from the MoboMath menu.
Tap the Display tab to select it.
Tap any color box to change its setting using the standard Colors panel.
To revert to MoboMath's default colors, tap the Restore Defaults button.