0 line style of Chart.js line chart

Line Colors are handled by setting the fill colors in the datasets you feed to the chart. The most notable would be fillColor, strokeColor, and pointColor.

Here is a sample line chart object that colors the 2 lines/series in the chart:

var obj=    {
                labels : ["January","February","March","April","May","June","July"],
                datasets : [
                    {
                        label: "My First dataset",
                        fillColor : "rgba(220,220,220,0.2)",
                        strokeColor : "rgba(220,220,220,1)",
                        pointColor : "rgba(220,220,220,1)",
                        pointStrokeColor : "#fff",
                        pointHighlightFill : "#fff",
                        pointHighlightStroke : "rgba(220,220,220,1)",
                        data : 1,2,3,4,5,6,7]
                    },
                    {
                        label: "My Second dataset",
                        fillColor : "rgba(151,187,205,0.2)",
                        strokeColor : "rgba(151,187,205,1)",
                        pointColor : "rgba(151,187,205,1)",
                        pointStrokeColor : "#fff",
                        pointHighlightFill : "#fff",
                        pointHighlightStroke : "rgba(151,187,205,1)",
                        data : [1,2,3,4,5,6,7]
                    }
                ]

            };