Female orange tabby cats are less common than males though, for much the same reason. They have to get the orange genes from both parents otherwise they are just calico.
Side bit - the wiki page for X chromosome inactivation shows a picture of a tortoise shell cat. https://en.wikipedia.org/wiki/X-inactivation
http://messybeast.com/tricolours.htm
And white spots gets into interesting questions of embryonic cell differentiation http://messybeast.com/bicolours.htm
The "why are there large splotches of color with a calico cat compared to the much more mottled color pattern of a tortoise shell cat?"
http://messybeast.com/genetics-index.htm has a deep rabbit hole to go down (and that's for domestic cats... http://messybeast.com/wildcats-index.htm for the other cats).