She is pretty, whatever she is. Odds are she is a DSH mackerel tabby. Does she have a solid stripe down the middle of her spine, with more stripes branching off? The pattern resembles the skeleton of a fish, hence the name.
That was 8 yrs ago so I don't remember. Her mate was a grey striped tabby. Her mom has some white under her chin. It is odd that Coco has a dark streak down her back. I also saw a stray brown cat and a stray white cat at my apt. Her last litter before rescued her mate was white with grey spots. She loved to have babies. Glad she was finally rescued. I agree,dsh but doesn't matter!