Can fire turn black?

This is black fire. When you mix a sodium street light or low-pressure sodium lamp with a flame, you'll see a dark flame thanks to the sodium and some excited electrons. "It's strange to think of a flame as dark because as we know flames give out light, but the sodium is absorbing the light from the lamp.

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Regarding this, what does grey smoke mean?

White smoke can often mean material is off-gassing moisture and water vapor, meaning the fire is just starting to consume material. Grey smoke can indicate that the fire is slowing down and running out of materials to burn. What does a purple smoke grenade mean? The violet-colored smoke grenade was used in-theater because of its vivid color; previously it was only used in the United States for training. When a ground element popped smoke to identify its location to aircraft, the aircraft was not told the color, but told to identify the color they saw.

One may also ask how hot is purple fire?

What is the coldest fire color?

And another question, what colour is fire?

Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam. How do you describe the color fire?

Thereof, what color smoke is the hottest?

For example, a blue flame is the hottest followed by a yellow flame, then orange and red flames. Hydrocarbon gases burn blue whilst wood, coal or candles burn yellow, orange or red. A blue gas flame colour is also indicative of complete combustion.