# File lib/rspec/core/configuration.rb, line 440
      def color=(bool)
        if bool
          if RSpec.windows_os? and not ENV['ANSICON']
            warn "You must use ANSICON 1.31 or later (http://adoxa.3eeweb.com/ansicon/) to use colour on Windows"
            @color = false
          else
            @color = true
          end
        end
      end