Is it possible to have a blue eyed daughter?

I am doing a biology task in which I research the genetic inheritance of a family. The father has brown eyes and the mother blue. From what I understand since a male has a Y chromosome they cannot be a carrier of an allele and therefore can only have BB (brown eyes) alleles. The mother could be a carrier, but since she has blue eyes brown eyes are dominant to it so she wouldn't be able to be a carrier... so why do they have a blue eyed daughter? :s please help, this is also a real scenario.