How cultures are different across the globe, I would have used RED for hot, orange for heating and green for safe (instead of orange, purple and blue - love purple though!)
Interesting, I'm not sure that colorblindness can be severe enough for that to be a problem. I'm red/green colorblind, but I have no issue with stoplights or LEDs. Things onlystart to get hairy once the spectrum shifts closer to the browns such as forest green or burnished slate.
I was quoting from the article, which, admittedly, isn’t straight from the horses mouth. If there’s a discrepancy, one of them is wrong (I think I know which).
> While there’s no display, the illuminated ring behind the grip does provide a visual indicator of what the iron is doing: solid blue means it has power but the heating element is off, a pulsing blue indicates the iron is heating, and orange means it has reached the desired temperature. If you flick the heater switch off, the ring pulses purple until it cools back off and returns to blue.