+ """This method will return a red, green, blue tuple representing a
+ contrasting color given the red, green, blue of a background
+ color or a color name of the background color.
+
+ >>> pick_contrasting_color(None, 20, 20, 20)
+ (255, 255, 255)
+
+ >>> pick_contrasting_color("white")
+ (0, 0, 0)
+
+ """