These are the same LEDs I use on my BF-2 and TR-2 Mods. Based on availability I will ship either a Blue/Red or Green/Red Bi-Color LED. What I ship will depend on what I can find available at any particular time. For instance on my TR-2 mods when the pedal is in bypass the LED will blink Red showing the Rate the Tremolo is set to by the Rate Knob. Then once the effect is engaged the LED will show Blue or Green. This allows the LED to perform two tasks.