Swart a.
  1. Of a dark hue; moderately black; swarthy; tawny. “Swart attendants.” --Trench. “Swart savage maids.” --Hawthorne.
     A nation strange, with visage swart.   --Spenser.
  2. Gloomy; malignant. [Obs.]
  Swart star, the Dog Star; -- so called from its appearing during the hot weather of summer, which makes swart the countenance. [R.] --Milton.