Dye colouring for home heating use, is a local issue, and varies from Province to Province, State to State. It's so when the the DOT occasionally sets up a roadblock, they can identify "illegal" fuel being used in transportation applications. Technically, P50 is legal to use in a "stationary engine". Up here in rural Canada, the DOT checks fuel use regularily, to make sure the tax breaks are going where they are supposed to. Sometimes the dye is put in, right at the pumper truck. Occassionally, I've been asked, "do you want the dye put in", when obviously, he is pumping into a heating oil tank. "No thanks" is the usual reply.
So, the colour of your home heating fuel is regional, and can be any colour, so long as different than local motor fuel. I've seen green, purple, and red.
Sounds like the "Geared TurboFan" is treating you well.