# File lib/rspec/core/configuration.rb, line 382
      def color=(bool)
        return unless bool
        @color = true
        if bool && ::RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
          unless 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