# File lib/rspec/core/configuration.rb, line 415
      def color=(bool)
        if bool
          @color = true
          if RSpec.windows_os? and not ENV['ANSICON']
            warn "You must use ANSICON 1.31 or later (http://adoxa.110mb.com/ansicon/) to use colour on Windows"
            @color = false
          end
        end
      end