Model SL-36. I am a heating contractor out of Chicago and have no experience with fireplaces. I am at the inlaws and thier FP pilot needed to be lit. Lit the Pilot and the generator held in. Fired up the burner and noticed the flame is blue at the base, some orange, a little yellow and a lot of white at the top 1/2 of the flames. Is this normal. Thought it may be an effect from the logs rather than a mixture problem. There is only a very slight amount of orange if any and it is venting properly.... Up through dedicated chimney.