i made one with appliqued sail boats, fish and waves. put a life preserver ring in the middle and named it the ssdreamer. bright blue, buttery yellow, sage green, light blue and white for squares. boats in those colors plus rust, red and white stripe, turqouise, green and tan little checks. gave it and matching bumper pads to my daughter at her baby shower. her friends are young twenties to older than me. the younger ones especially liked it.
for the 1st grandbaby i made all his crib sheets so i had four large squares of each color or print. i quartered them and backed them with a solid bright blue. quilted fat fish and little fish, waves, water bubbles, and sea grass. that one one a big hit with the same friends too.
i'm a mid 50s grandmother and greatgrandmother. i like pastels if they are very old fashioned prints but mostly go bold colors.