Bubble Chart with different colors

HTML

<script type="text/javascript" src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/xy.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/none.js"></script>
<div id="chartdiv"></div>

CSS

#chartdiv {
	width	: 100%;
	height	: 500px;
}

JavaScript

var chart = AmCharts.makeChart("chartdiv", {
    "type": "xy",
    "pathToImages": "http://www.amcharts.com/lib/3/images/",
    "theme": "none",
    "dataProvider": [{
        "y": 10,
        "x": 14,
        "value": 59,
        "color": "#cc0000"
    }, {
        "y": 5,
        "x": 3,
        "value": 50,
        "color": "#00cc00"
    }, {
        "y": -10,
        "x": 8,
        "value": 29,
        "color": "#5555cc"
    }],
    "valueAxes": [{
        "axisAlpha": 0,
        "position": "bottom"
    }, {
        "minMaxMultiplier": 1.2,
        "axisAlpha": 0,
        "position": "left"
    }],
    "startDuration": 1.5,
    "graphs": [{
        "balloonText": "value:<b>[[value]]</b>",
        "bullet": "circle",
        "bulletBorderAlpha": 0.2,
				"bulletAlpha": 0.8,
        "labelText": "[[value]]*3",
        "labelPosition": "middle",
        "lineAlpha": 0,
        "fillAlphas": 0,
        "valueField": "value",
        "xField": "x",
        "yField": "y",
        "maxBulletSize": 100,
        "minBulletSize": 30,
        "colorField": "color"
    }],
    "marginLeft": 46,
    "marginBottom": 35
});