Gatsby And Circle Lenses?

Which Gatsby Would Work The best on my hair? my hair is about ped my shoulders by about 5cm and i am thinking of putting gatsby in my hair and putting the top layer up but i do not know which gatsby to use, also for circle lenses i am getting another pair but i have no clue on which colour i should get i am thinking of getting GEO Angel brown or Magic black but i do not know which magic black one to get, i am azn, kthxxbaii