A healthy, properly burning flame on gas appliances should be blue in color, sometimes with a tiny tip of yellow, with a little light blue triangle at the center. This blue color flame indicates that there is safe, efficient and more complete fuel combustion. … you always want to see a blue color flame ./ If you see orange flames instead of blue flames , the burners may need cleaning or adjusting. … ORANGE 
The orange color alerts you to your gas stove’s improper combustion, which may emit unsafe levels of carbon monoxide gas .YELLOW OR RED A yellow or red flame on a gas appliance is dangerous , as it is indicative of incomplete combustion and carbon monoxide (CO) generation.BLUE FLAME
A blue flame colour means complete combustion. This indicates that the gas is being burned efficiently without any unburned and wasted gas. With complete combustion you get the maximum heat output from your gas and use less gas to generate heat with whatever appliance you are using. Blue flames burn hotter than orange flames , with temperatures reaching up to 3,000 degrees Fahrenheit. … They heat up more quickly and to higher temperatures .
