What color is Avgas 100LL?

Avgas 100LL, which stands for Aviation Gasoline 100 Octane Low Lead, is colored blue. The blue color is a distinctive feature designed to identify this type of aviation fuel and differentiate it from other types of aviation gasoline. It helps pilots, ground crews, and refuelers quickly recognize the specific fuel required for aircraft engines that operate on this fuel type, thus reducing the risk of fuel mismanagement. The color-coded system is crucial in aviation operations, enhancing safety by ensuring that the correct fuel is used. The other options listed represent other fuel types or are not associated with Avgas 100LL; for example, Avgas 100 (without the low lead designation) is specifically colored green, and Jet A fuel is typically clear or straw-colored.