Black and Tan
Take a little light ale, and add some dark...and you get a Black and Tan.
Take a little Oatmeal Stout Fragrance Oil, add some Beer Fragrance Oil...mix up the soap...and you get a Black and Tan!
The antibacterial properties of the hops carry over to the soap, and the oils make for a non-drying cleansing experience. I'm seeing some college student gifts here!