electromagnetic radiation - Light emitted by an object according to its temperature

According to this picture

the light emitted by an object depends on its temperature.

That makes perfect sense when we heat a metal. As its temperature raises we see it red at first, then orange, then yellow... and then?

If we heated it even more should we see the metal turning green? and then blue?

Answer

You would be unlikely to see green. The problem is that in order to see green, you would need the spectrum of emitted light to peak at green and have relatively little contribution from other frequencies. This, for example, is the reason you do not see green stars (There is a cute Feynman story about this). An explanation of color temperature is given on wikipedia. Here is the path a black body takes with temperature increase--a Planckian locus diagram .