Actually, I am pointing out a fact about incandescence that has been common knowledge for thousands of years. All materials glow at the same color at a given temperature.
While theory suggests this should be so, it is not strictly true. Some materials - like copper and Aluminium seem to make it harder to see the glow. Steel and many ceramics make it easy. Thorium gas mantles for example glow brighlty at relatively low temperatures. My experience with naked Alumina tubes withdrawn from a brightly glowing reactor housing (quartz and Kanthal inside a foamed Alumina block) running at (say) 1000C is that they glow a dull cherry-red looking much cooler than the housing they come from. Steel at the same temperature will glow orange. There has been much discussion in here about the band emissivity of Alumina -I suspect any difference or anomaly in the glow colour is related to this.
So I think it safer to say 'all similar materials glow the same colour at the same temperature.'
ETA- steel glow colour chart.