Why does my flame look blue when I turn my fireplace on?

This is not uncommon.  Combustion air levels could be a bit low and the draft will take a couple of minutes to get well established.  It normally takes a few minutes for the flames to adjust on a cold start.  LP seems to have a tendency to look a little more bluish on start-up than natural gas.  But after 5 – 10 minutes a healthy LP or NG gas flame should be a yellow/orange color.  If not, it’s probably a good idea to call a certified gas fireplace technician to service the equipment.