For hardening, I went with non-magentic (when the magnet won't stick).
That's also a glowing cherry red type of colour.
For forging, I was generally going for red hot. I had to run from the forge-pit-thing to the shed where the anvil was.
Sometimes it was in the coals for 10 minutes-25 minutes. For hardening, I had it in there a good 10 minutes at full heat at least, between 10-15 minutes. I normalized it once, and after that, I had it in the coals for about 30 minutes before cranking the temp up for getting it ready for heat treat.
A proper forge with an actual read-out would be SO much better and easier. The magnet can let you know when you're about hot enough, but not if you get too hot. I doubt that it got too hot, given the time it took along the way at times.
At least the omens were positive.
Went through 38 POUNDS of charcoal that day!