Blue flame

**Blue flame**

A “blue flame” refers to a flame that appears blue in color due to complete combustion. In various contexts, it symbolizes purity, high efficiency, and intense heat. Blue flames are commonly seen in gas burners, where the fuel burns cleanly with sufficient oxygen, producing a hotter and more efficient flame compared to yellow or orange flames. This tag can be used for posts related to science, chemistry, energy, cooking, or symbolism involving blue flames.