Under TICA guidelines, she would be called Calico, which is Tortoiseshell with White. She may be dilute as the 'red' is not a striking red or orange but a bit muted.

Here is the link to TICA's color information.

http://www.seregiontica.org/Colors/intro.htm

When you get to the bottom click on the "Torties / Torbies" and also on the "With Whites" and you will get to see photo examples as well.

Here is another interesting discussion of color:

http://www.fanciers.com/cat-faqs/tricolors.shtml

From the above:

The difference between a calico and a tortoiseshell is this:

With a calico, there is a significant amount of white, and the two colors are broken up into distinct patches. This has to do with the interaction of white spotting.

With a tortoiseshell, the three colors are blended and don't form distinct patches. A tortoiseshell may have significant portions of white as well, but the remaining colors are blended (this particular pattern is called a tortoiseshell and white).

A torbie, or patched tabby, is a tortoiseshell where the tabby pattern is very distinct all over the cat. A calico or tortoiseshell may have distinct tabby pattern on the red or cream patches (has to do with another gene we won't get into at this juncture), but no patterning on the other color. This isn't a torbie. A torbie is clearly patterned all over the cat -- though never on the white.

So under this classification, she would be tortoiseshell and white, as her colors are blended not distinct patches.