If humans had only one gene for eye color with two alleles (B and b) and it was expressed as complete dominance, how many different colors of eye would be possible from the choices below?

2 phenotypes: Brown eyes and Blue eyes
3 phenotypes: Dark brown eyes, medium brown eyes and light brown eyes
3 phenotypes: Dark brown eyes, eyes with brown and blue areas and blue eyes
There would be a large range of phenotypes: shades of brown, hazel greens and blue