the hottest flame is white as made fact by nasa
Answer. It depends on what you are burning. There are many chemicals that you can burn that produce abnormal colors. An example would be when you burn Lithium, it gives off a hot pink flame. But for...
All the toluene I've ever worked with is clear--what they call "water-white."
blue is the hottest and red is the coldest
When you see in the gas stove you see a blue flame and a bits of yellow