Interesting topic and I can see how this is a daily issue for some, but I don't get the startup angle. What's the eventual monetization angle? Referrals for hair stylists? Paid membership to get new lists of or customized styles? Which of the pictures of the girl (linked to the dropbox share) is closest to her natural hair? The styles are so varied it's impossible to tell! On the aesthetic front (obviously IMHO) it's…
http://www.pakcosmetics.com/hair-care/relaxer-n-texturizer/h...
And that's just one category of types of hair products that are rarely used on white hair.
That should give a slight idea of the referral opportunities..