Bay, just bay

GrrlScientist has a post about Barbaro's being interred at Churchill Downs, quoting a Bloomberg story in which he's called "The bay colored colt".

Now I don't mean to be picky, but "bay" is not a color. He wasn't "bay colored"; he was just "bay". Technically, he was black, with a gene that restricts the black color to his extremities, leaving his body the default, recessive red. Bay is the pattern, not the color.