Colors: color gradient

The color of Bar Chart can be defined by gradient property.
In this case you should set a function that takes a gradient object as an argument. And using addColorStop you may define colors for chart.

Source

<script src="../../codebase/dhtmlxchart.js" type="text/javascript"></script>
<link rel="STYLESHEET" type="text/css" href="../../codebase/dhtmlxchart.css">
 
<style>
    .dhx_chart_title{
        padding-left:3px
    }
</style>
<script>var data = [{
    sales: "2.9",
    year: "2000"
}, {
    sales: "3.5",
    year: "2001"
}, {
    sales: "3.1",
    year: "2002"
}, {
    sales: "4.2",
    year: "2003"
}, {
    sales: "4.5",
    year: "2004"
}, {
    sales: "9.6",
    year: "2005"
}, {
    sales: "7.4",
    year: "2006"
}, {
    sales: "9.0",
    year: "2007"
}, {
    sales: "7.3",
    year: "2008"
}, {
    sales: "4.8",
    year: "2009"
}];
window.onload = function() {
    var barChart = new dhtmlXChart({
        view: "bar",
        container: "chart_container",
        value: "#sales#",
        label: "#year#",
        padding: {
            bottom: 0,
            right: 0,
            left: 0;
        },
        width: 30,
        gradient: function(gradient) {
            gradient.addColorStop(1.0, "#FF0000");
            gradient.addColorStop(0.2, "#FFFF00");
            gradient.addColorStop(0.0, "#00FF22");
        }
    });
    barChart.parse(data, "json");
}</script>
 
<div id="chart_container" style="width:500px;height:300px;border:1px solid #A4BED4;"></div>