Thats a nice looking girl! Both vanilla and fire are brightening genes, so that combination shouldn't brown out much at all with the pastel added.
Here are some examples of the vanilla scream (fire vanilla pastel)
http://www.worldofballpythons.com/mo...anilla-scream/
This one has super pastel in it instead, I would get this one instead of the vanilla fire pastel, it should stay really bright!
https://www.morphmarket.com/us/c/rep...pythons/298375
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