During the film Captain Marvel, the character we know as Vers discovers she is actually
and worked with Mar-Vell
as a test pilot for her lightspeed craft.
Later on in the film she levels up and changes into the more recognisable Captain Marvel costume but to the best of my knowledge she's never referred to by the name Captain Marvel. She's either referred to as Vers or by her recently rediscovered name.
My assumption is that when Vers went from green to blue she became Captain Marvel but is that correct? Or does that name refer to Mar-Vell?