My two year old does not know her colors?

my daughter turned two in may and I know that a lot of two year old don't know there colors but she has an amazing memory she can tell you how to spell her name her sisters mommy and daddy she knows all shapes even octagon and crescent and she points them out to me all the time and she remembers the name of every person she meets talks in complete sentences like im so tired i wanna go upstairs n go ni Night I even went to a gas station today that we dont go to often and about 3 months ago ran into her aunt there and as soon as we pulled up she said wheres my ant abbys car but she can not get her colours