I am sure that the baby won't mind. I would love a nice soft blankee
I really love the color combo of Yellow/blue for baby items, so I believe that the previous suggestion of a blue border is a very good idea
a simple and neutral border for any gender baby is as follows:
Join border color yarn at any part of blanket edge
ROUND 1: Single Crochet around entire edge (single crochet 3 or 4 times in every corner so it does not gather) join with a slipstitch in first Single crochet
ROUND 2: Chain 1, Slipstitch in first Single Crochet, *chain 1, slipstitch in next Single Crochet-- repeat from * around. Join with a slipstitch in first chain 1 space, finish off.