: {
        display: true,
        text: 'Grid Line Settings'
      }
    },
    scales: {
      x: {
        grid: {
          display: DISPLAY,
          drawBorder: BORDER,
          drawOnChartArea: CHART_AREA,
          drawTicks: TICKS,
        }
      },
      y: {
        grid: {
          drawBorder: false,
          color: function(context) {
            if (context.tick.value &gt; 0) {
              return Utils.CHART_COLORS.green;
            } else if (context.tick.value &lt; 0) {
             