Sexing a leg bar chick

I have four little chicks all are so cute I have heard that a leg bar is auto sexing so it should be easy to sex what is the difference

With cream legbars at day old the male should be paler and have a cream dot on the top of his head, 

Picture on here for you to compare.  Markings are as mentioned by other members.

www.cream-legbar.co.uk/gallery.html

he has a small dot on his head so i prosume it is a boy so disappointed letting mom keep him till he no longer needs her he is so cute but not allowed boys i just hope the rest of the chicks are girls here hoping. Ive 2 black marans and ive forgot the other it was a buff coloured egg but showing signs of being a boy.