code: func NewStyle(fg Color, args ...interface{}) Style {
  	bg := ColorClear
  	modifier := ModifierClear
  	if len(args) >= 1 {
  		bg = args[0].(Color)
  	}
  	if len(args) == 2 {
  		modifier = args[1].(Modifier)
  	}
  	return Style{
  		fg,
  		bg,
  		modifier,
  	}
  }
docs: // NewStyle takes 1 to 3 arguments
  // 1st argument = Fg
  // 2nd argument = optional Bg
  // 3rd argument = optional Modifier