# File lib/color/rgb.rb, line 46
    def from_html(html_colour)
      html_colour = html_colour.gsub(%r{[#;]}, '')
      case html_colour.size 
      when 3
        colours = html_colour.scan(%r{[0-9A-Fa-f]}).map { |el| (el * 2).to_i(16) }
      when 6
        colours = html_colour.scan(%r<[0-9A-Fa-f]{2}>).map { |el| el.to_i(16) }
      else
        raise ArgumentError
      end

      Color::RGB.new(*colours)
    end