In the blue heat of the flame, she could see herself as a child.

These give out blue light at the heat of the flame.

Some are used to change the color of the flame.

He looked back once, a wall of flames behind him.

Back outside, she was met by a wall of flame.

I think he's trying to make some sort of very hot flame.

We had enough to do trying to stay ahead of the flames.

Those who were not killed felt the heat of the flames.

He kept on until the last of the flames died.

Or the small blue part at the base of the flame?