Description I think that the medi gun shooting a blue beam would be more reflective of star wars lore
( Detailed description of the suggestion / feedback ) the only way i can think of the medi gun working is with bacta and bacta is a light blue. So it would make more sense for the beam to be blue so it looks like its shooting a beam of bacta, kinda like in the Republic commandos game. And maybe add a blue tank on it where you can see bacta in its liquid form but that doesnt matter much it would just look cool.
( Any helpful resources - videos / images )