Lots of blabber but there was a LOT of thought that went into him
Oceans idea was based off the Ocean (Obviously) and the waves. His hair was made to look like waves and a gradient was needed to show that better. His hooves were to seem like the sand on beaches and it's obviously never seen but I depict his hooves to have a sandstone fell to them. And his eyes showed an algae color scheme. Heck even the way his tail and mane is curled is supposed to represent curved waves.