Looks like you'll have to paint both letters blue and then the colors you like.blue seems to be dominate as one fix.then again you can kilz both letters and then your colors.don't you hate it when that happens,lolyou gotta do what you gotta do,looks like no short cuts here that i can see but maybe some one else will chime in and save the day ,All hope is not lost,hang in there till the artillery gets here.you puzzle pieces look nice and big for little hands.You could also add a flower or some small object to add as decoration to hide the blue also.there's more than one trick to this delema.i'd ll be interesting to see what works for you.i'll check on this often so i can learn something to.