In late-2006/early-2007, I purchased Kikki and Sami for $5 each specifically to deepen their complexions. Using a mixture of tan and brown Rit dye and boiling water, I accomplished this task to my satisfaction. Surprisingly, Kiki's hair color did not change. Sami's original, near-black hair is now brunette.
Kikki and Sami after their dye baths