I'd like to see someone else's input as well. In its absence, I'll simply explain that the colors are from shooting at WB 3500K. This is the recommended setting I found in several google searches I performed just before going out the other evening, and in preparation for the Aurora event last May.
In contrast, a friend shooting at the same time was using an EOS R6 set to Cloudy. His images display the more typically presented hues for the Aurora.. I was able to duplicate that effect in my images if I opened them in Canon's DPP and set the WB to Cloudy.
