Though a lightning bolt radiates pure white light, various atmospheric conditions can tint the brilliant flash into a rainbow of electrical colors. Red, yellow, green, blue, pink, purple, violet, cyan, and orange are all possible lightning colors, depending upon the presence of water vapor, dust, pollution, rain, or hail.
Just as lightning is said never to strike twice in the same place, no two lightning bolts are ever exactly the same color. In fact, different branches of the same bolt can exhibit different colors, due to temperature variations. The hotter the bolt, the bluer or whiter it will appear, and the cooler it is, the more orange or red. Because lightning heats the air as it travels, the presence of different gasses will also lend color as they ignite.
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