Rickshaw: how to set color for x and y axis?

How I can set another color for the grid lines in chart? I use his example:

<!doctype>
<head>
    <link type="text/css" rel="stylesheet" href="../src/css/graph.css">
    <link type="text/css" rel="stylesheet" href="../src/css/detail.css">
    <link type="text/css" rel="stylesheet" href="../src/css/legend.css">
    <link type="text/css" rel="stylesheet" href="css/extensions.css">

    <script src="../vendor/d3.v3.js"></script>
    <script src="../rickshaw.js"></script>
</head>
<body>

<!-- <div id="content">
    <div id="chart"></div>
</div>
 -->
 <style>
#chart {
    position: relative;
    left: 40px;
    }
#y_axis {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 40px;
}
#x_axis {
    position: relative;
    left: 40px;
    height: 40px;
}
</style>
 <div id="chart_container">
    <div id="y_axis"></div>
    <div id="chart"></div>
    <div id="x_axis"></div>
</div>

<script>

var tv = 250;

var graph = new Rickshaw.Graph( {
    element: document.getElementById("chart"),
    width: 900,
    height: 500,
    renderer: 'line',
    series: new Rickshaw.Series.FixedDuration([{ name: 'one',color: "#30c020"}], undefined, {
        timeInterval: tv,
        maxDataPoints: 100,
        timeBase: new Date().getTime() / 1000
    }) 
} );

///
var y_ticks = new Rickshaw.Graph.Axis.Y( {
    graph: graph,
    orientation: 'left',
    tickFormat: (function(d) { return d+"%";}) ,
    element: document.getElementById('y_axis')
} );

var xmark = 0;
var format = function(n) {

    var map = {
        0: 'zero',
        1: 'first',
        2: 'second',
        3: 'third',
        4: 'fourth'
    };

    return '|';
}
var yformat = function(n) {
    console.log('yformat0: '+n);
    var nn = n+'%';
    return nn;
}

var x_ticks = new Rickshaw.Graph.Axis.X( {
    graph: graph,
    orientation: 'bottom',
    element: document.getElementById('x_axis'),
    pixelsPerTick: 200,
    tickFormat: format
} );

graph.render();

var i = 0;
var iv = setInterval( function() {
    var data = { one: Math.floor(Math.random() * 40) + 120 };
    graph.series.addData(data);
    graph.render();

}, tv );

</script>

</body>

Solution

Richshaw provides some nice color palettes.

Look at palette.color() in the above code snippet. It will suggest nice color for every data series. if you want to know more palettes, you can find in its wiki page.

var palette = new Rickshaw.Color.Palette({scheme: 'munin'});
var graph = new Rickshaw.Graph({
  element: your_dom_element,
  renderer: "line",
  interpolation: "linear",
  series: [{
     name: "series 1",
     data: your_data_array,
     scale: your_scale,
     color: palette.color()
  }, {
     name: "series 2",
     data: your_data_array,
     scale: your_scale,
     color: palette.color()
  }]
});