Not sure about the USA but up in the north land you can find coloured fuel and marina ( same stuff ) with no ethanol in 97 octane.
Might be the same in the USA.
Boaters don't like the 10% ethanol, just too many places on a boat to pull moister into the fuel system and ethanol will just help pull that water out of the traps into the engine
Also, coloured fuel is cheaper since it has no road tax.