He's a black variegated.
And be careful with that Kaytee diet.. It can have ethoxyquin as a preservative, which is known to cause cancer. Not something I want to be feeding my rats or my snakes. Kaytee diets are very poor quality in general, so it would be best to find a feed store in your area that stocks Purina products and get a 50lb bag of Mazuri Rodent blocks(6F or 9F). Much higher quality ingredients and your rats will appreciate it.