Brad, let burner three burn for a while. Sometimes the orange is just from debris burning off. Otherwise, you can try adjusting the shutter on the burner where it meets the manifold. If you loosed the screw on that goldish looking cap, you can turn the shutter to restrict or open air flow which will change the flame. I am not sure which way you would want to turn it, but you can experiment. Just make not of where it is when you start, so if you have trouble dialing it in, you can always go back to the way it was.