From memory the gene works that if there is NO blue/green in your DH's parentage, babies eyes will be brown.
I suppose it's not a hard and fast rule but i remember doing 'punnet squares' in yr 12 biology for gene pairing and it makes sense.
Something like as follows - To have a blue/green eyed baby, one parent needs to have a dominant gene and the other a recessive for it.
Recessive gene come from their parents.
I was shattered when I found a refresher on gene pairing and realised that even though I have blue eyes I won't have a blue eyed baby.