minimum_color_diff= (Color::Palette::MonoContrast)

        # File lib/color/palette/monocontrast.rb, line 74
    74:   def minimum_color_diff=(cd) #:noco:
    75:     if cd.nil?
    76:       @minimum_color_diff = DEFAULT_MINIMUM_COLOR_DIFF
    77:     elsif cd > 3.0
    78:       @minimum_color_diff = 3.0
    79:     elsif cd < 0.0
    80:       @minimum_color_diff = 0.0
    81:     else
    82:       @minimum_color_diff = cd
    83:     end
    84:     regenerate(@background[0], @foreground[0])
    85:   end