Where To Get High Octane Gas...

Does anyone know the research octane and motor octane numbers for aviation gas that is called 100 LL (low lead?)

I have access to that, but am curious about what kind of pump octane numbers it would be rated at (R + M divided by 2).

Also, what color is this 100LL????

Thanks for any information...:read2:

PS What's an "FBO"????