A,B,C,D,E,F and G are seven kids playing in the garden. They are wearing a clothes of colours - black, blue, white, green, pink, yellow and brown. Out of the seven, three are girls. No girl is wearing either black, yellow or brown. D's sister F is wearing pink while he is wearing brown. A is wearing blue, while his sister B is not wearing green. E is wearing yellow, while his best friend G is a boy.
What colour is B wearing?