Final answer:
Aqueous Film Forming Foam (AFFF) concentrate is typically light yellow in color and is used to fight fires of organic liquids by creating a barrier to exclude oxygen.
Step-by-step explanation:
The color of Aqueous Film Forming Foam (AFFF) concentrate is typically a light yellow. This type of fire-extinguishing agent is widely used in fighting fires, especially those involving organic liquids. AFFF works by creating a barrier that suffocates the fire and prevents the access of oxygen, thus extinguishing the flames. The foam is fluorinated, meaning it can spread quickly over the surface to smother the fire effectively. Additional ingredients may be added to the concentrate to modify properties such as foam stability or viscosity, depending on the expected usage scenarios.