Okeetees are one of two things, depending on whom you're talking to.
First, they are a "locality", meaning they come from a specific area, and the majority of snakes from that area share the same look.
They are also line-bred to have a BRIGHT orange ground color with deeeeeep red saddles and thick, heavy black borders around the saddles. The thicker, the better.
They are basically a "wild type", meaning that the look is not a single recessive morph, and is pretty much dominant in that particular location(I believe), but a few people have worked with them for such a length of time to achieve and incredibly bright and pretty snake with thick black borders and a clean and bright overall coloration, without the overall "melanin wash" found in a lot of "normals". Kathy Love and Lee Abbott are two breeders that have just about perfected the "look" of the Okeetee...