Most women are brunette, so it'd be my guess that black is the biggest seller.

Browns are out there. I've seen browns at Walgreens, Target, and of course Ulta. I have found, though, that it matters what brand you're looking at. Cover Girl seems to focus more on lighter complexion/haired women, while Maybelline focuses more on brownettes/brunettes.

But I do use black mascara on my bottom lashes. Brown just not work because I have to do too many layers and it is a bitch to get off at night.

But hell, I don't like makeup anyway, except for special occasions - and only lightly applied then.

but occasionally I can find the Max Factor Mascara in Auburn, and that is what I usually wear. It makes my eyes look bluer!

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Benefit BADgal Brown Mascara
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I don't know what you're used to paying but this was $19.
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Black mascara looks BAD on me. Very hard to find mascara.

Available at Target, I believe. $21. Here's the link: http://www.lavera.com/products/Volume_Mascara_Brown-984-1000024.html

$21 is pricey, but I recently used an Estee Lauder mascara that my sister sent me and when it ran out, I tried a drug store brand and the difference in how my lashes felt (soft with EL, vs. crinkly and awful) was huge.

I was never a believer in more expensive mascara until recently.

But I will not be going back to Estee Lauder because they've started testing on animals again (apparently it's required if you want to sell products in China, so they're being profit-whores and animal testing again).

Unfortunately, the product MFM suggested, while it gets rave reviews, also is by a company (BeneFit) that tests on animals.

Physician's Formula doesn't, but they only have brown-black, from what I can tell.

If it interests you, here's PETA's list of companies that don't test: http://www.mediapeta.com/peta/PDF/companiesdonttest.pdf

Whatever you think of PETA and their tactics, this is an excellent list if animal testing is an issue that concerns you.