 
     # Return the graph configuration.
     data: chart_data(resources, config)
-    multiSeries: config.y.data.length > 1
     yFormat: decimal_formatter(precision)
     yLabel: config.y.label
     yMaxMin: _.values(chart_y_range)
-    color: (d, i) ->
-      config.y.data[i].color
-    
+
   # Replaces the given text elements with hyperlinks.
   d3Hyperlink: (element, href, style) ->  
     # The parent node wrapped by D3.

        [
          {
            label: 'FXL Ktrans'
            color: 'OliveDrab'
            accessor: (session) -> session.modeling.fxl_k_trans
          }
          {
            label: 'FXR Ktrans'
            color: 'BurlyWood'
            accessor: (session) -> session.modeling.fxr_k_trans
          }
        ]

  # @param data the session array
  # @returns the nvd3 chart format
  configure_chart: (sessions, href) ->
    chart_cfg = Helpers.configure_chart(sessions, config)
    chart_cfg.xValues =
      config.x.accessor(sess) for sess in sessions
