what do the colors of smoke and colors of flames indicate about a fire?

A hot, clean-burning fire will emit very little visible smoke; yet, a hot, fast-moving fire in an under ventilated building will show a tremendous volume of smoke. Dampened material will burn slowly and emit lots of smoke, typically a lighter color. The color of a flame depends on a variety of conditions. Not only temperature, but chemical composition and the amount of oxygen present can change the color of a fire. So, why is a wood fire orange? Because it’s a hydrocarbon, and it burns at about 1000 -1100 degrees Celsius, with just the right amount of oxygen.