If you have a bicolor LED it probably has 3 leads on it. One long lead which is normally the negative terminal (-) and two shorter leads, one for each of the two colors and are the positive terminals (+).
The longer lead is wired to the negative part of your circuit. Then you can apply a positive lead
with resistor to each of the two smaller leads separately and use whichever one you want for whatever purpose. It's just like two leds in one but each sharing a common ground.
Hope this helps.