Question: are red dwarfs actually red?
Answer: Red dwarfs are small (0.08-0.5 M⊙), low-surface temperature (2500-4000 K) Main Sequence stars with a spectral type of K or M. It is their low temperature which dictates their red appearance. ... Because they are so small and have such low mass, they evolve slowly with estimated Main Sequence lifetimes of 100 billion years.