I think your idea of using dark blue for the quilt and light for the bumpers sounds great!
I'm partial to gingham curtains for nurseries.
if i can find a couple of pics of some tops i've made recently I'll send them off to you. maybe give you some ideas.

Hi bakermoon

had a short look at the gingham curtains......lovely fabric! where do you buy it and do you use it for babyquilts also?
Granny