Bizarre question: Is it possible to change the color range used by the HeatColor function? …and/or can another color selection function be used in place of HeatColor in a sketch with similar coding to Fire2012?
Use Fire2012withPalette.ino
Exactly so.
Alternatively, just write any function that takes a single byte input and returns a CRGB color.
Awesome! Thank you both very much for your replies. 