Likewise, why does a gas burner flame turn blue?
Red or yellow gas flames may be the sign of incomplete combustion. With hydrocarbon flames, such as gas, the amount of oxygen supplied with the gas determines the rate of combustion. When you adjust a burner to increase the air supply you get more complete combustion, less soot, a higher temperature and a blue flame.
Similarly, what does Blue Flame indicate? A blue flame indicates safe and efficient combustion, meaning that the gas is being burned efficiently and not being wasted. Blue flames are hotter and indicate more complete combustion.
Keeping this in view, should gas fires have a blue flame?
A gas fire blue flame when the fire is initially turned on is quite normal. If your gas fire is blue with orange tips this is also quite acceptable as it's often temporary due to dust in air particles, or a possible lack of oxygen. Colours of flames in gas fires may range from a yellow gas flame, through orange to red.
What Colour flame is dangerous?
The flame will be at a much lower temperature and will seem more sooty. The yellow colour comes from the soot particles produced by the flame. Yellow or red flames only burn at around 1,000 degrees C. This flame is dangerous as it produces more poisonous carbon monoxide gas.