# File lib/color/palette/monocontrast.rb, line 76
  def minimum_color_diff=(cd) #:noco:
    if cd.nil?
      @minimum_color_diff = DEFAULT_MINIMUM_COLOR_DIFF
    elsif cd > 3.0
      @minimum_color_diff = 3.0
    elsif cd < 0.0
      @minimum_color_diff = 0.0
    else
      @minimum_color_diff = cd
    end
    regenerate(@background[0], @foreground[0])
  end