Yes, they are littermates.  There were 9 of them, and in the litter there were 2 blue fawn girls(a sorta blue/beige color) 4 black and white, one white, one fawn and one brindle.  So, it was quite a rainbow litter.  We were fairly shocked when the blue's and white were born.  
I think they are all adorable, but I am highly biased.  I have only kept the white one, though, my husband *really* wanted to keep the black and white pictured also.