They should make them all the same color throughout all the films. I prefer the color that Anakin has in Episode 2 and 3, as well as Luke’s in Episode 5, and Rey’s in Episode 7 and 8.
Those pretty much match each other, with only a slight difference. It’s the cyan color in Episode 4 that is waaaaaaay off the other films. You only have to fix one film, not 7.