What color do turbine/jet fuels visually appear?

• A. Red
• B. Green
• C. Blue
• D. Straw/clear (light yellow)

Answer: (D)

Jet turbine fuels, like Jet A and Jet A-1, are essentially colorless to a pale straw in appearance. This light yellow or nearly clear look comes from their hydrocarbon composition and the fact that they’re not normally dyed for aviation use. In typical service, you’ll observe a clear to light yellow liquid when handling or inspecting fuel; the color can shift slightly with lighting or contamination, but it remains very light compared with many other fuels. If you ever see a fuel that’s distinctly red, green, or blue, that usually indicates a dye added for identification in a non-aviation context or, in some cases, contamination alerts—standard turbine fuels themselves are straw-colored to clear.