Why Does a Gas Burner Flame Turn Blue

You get a blue gas flame with a hydrocarbon gas when you have enough oxygen for complete combustion. When you do have sufficient oxygen, the gas flame appears blue because complete combustion creates enough energy to excite and ionize the gas molecules in the flame.

What does it mean when a flame burns blue?

A blue flame colour means complete combustion. This indicates that the gas is being burned efficiently without any unburned and wasted gas.

Should flames gas fire blue?

Gas flames should be blue but can sometimes burn red or yellow.