swarthiest

from The Collaborative International Dictionary of English v.0.48

Swarthy \Swarth"y\, a. [Compar. {Swarthier}; superl.
   {Swarthiest}.] [See {Swart}, a.]
   Being of a dark hue or dusky complexion; tawny; swart; as,
   swarthy faces. "A swarthy Ethiope." --Shak.
   [1913 Webster]

         Their swarthy hosts would darken all our plains.
                                                  --Addison.
   [1913 Webster]