Solid Eyes in Splash Horses

Alright so I've heard it more then once, that not all splash horses have to have blue eyes. And after looking at some AQHA horses, I wonder if I'm looking at Splash or Frame. I started with Big Chex to Cash http://www.allbreedpedigree.com/big+chex+to+cash which there he is listed as Sabino, his web page is listed as Overo, but I don't see a OLWS test for him on his stud page. He has blue eyes, but neither of his parents have blue eyes. His Dam's Sire line has a history of large Blazes. But no blue eyes that I can see. His sire has a large blaze as well, no blue eyes, no leg white, but a lot of his foals have lots of white on the head. And his Sire's sire line also carries a lot of blazes, and usually white on a back leg. But so far Big Chex to Cash is the only one with blue eyes.