How to setup LED (light-emitting diode) color for a category?
Open/Create a category from the categories list screen,

or from the reminder properties screen.

If your Blackberry device has a polychromatic light emitting diode (a small light indicator on the body of the device), the category properties screen also contains the «LED color» field.
Set the cursor on the «LED color» field and select «Choose color» or click on «Space» button.
