Why are there no green stars?

Why are there no green stars?

Video February 16, 2023
© Haus der Astronomie

Our sun is yellow. Even with the naked eye you can see: some bright stars like Aldebaran or Betelgeuse are orange-red. In photos of the starry sky, many distinctly bluish stars can also be seen. However, there do not seem to be any green stars –why is that?

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