Why is fire blue at the bottom?

7. Oxygen supply influences the color of the flame. So candle flames are blue at the bottom because that's where they take up fresh air, and yellow at the top because the rising fumes from below partly suffocate the upper part of the flame.

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What do blue flames mean?

complete combustion A blue flame color and temperature means complete combustion. Red flames or yellow gas flame color may be a sign of incomplete combustion, wasted gas and a serious safety hazard. Is black fire real? For real: If you shine a low-pressure sodium lamp on a yellow sodium flame, the flame will be black. Flames emits light and heat, so it seems impossible to make black fire. However, you actually can make black fire by controlling the wavelengths of absorbed and emitted light.

Is green fire hot?

A green flame is just as hot as any other kind of flame, except it has color added to it, due to the presence of a "contaminant". The contaminant may be copper, barium, thallium, barium or Niobium, in order for the flame to show a green color. Is purple fire real? Purple flames come from metal salts, such as potassium and rubidium. It's easy to make purple fire using common household ingredients. Purple is unusual because it's not a color of the spectrum. Purple and magenta result from a mixture of blue light and red light.