The closest thing we've got to a "star meter" is Forbes' Star Currency list, which tries to measure actors and actresses based on their worth to a particular project. Because, let's face it, actors are treated like commodities in the blockbuster film world.
http://star-currency.forbes.com/celebrity-list/top-celebrities
In the top 100, you've got Will Smith, Denzel Washington, Halle Berry, Samuel L. Jackson, and Tyler Perry. That's 5%, of course. You've got one star in the top 100 that identifies as Latino (Jennifer Lopez), and one star that identifies as Asian (Jackie Chan), and a couple mixed people that are seen as white.
There's lots of Latino representation on cable TV and in smaller works, but unless you're one of a handful of Latino people, you're not seen in the huge stuff. Same goes for Asian males, unless you're name is Jackie Chan or Jet Li.