set different colors for each column in highcharts

I need to set different colors for each column in Highcharts graph dynamically. My Highcharts graph is:

options = {
         chart: {
             renderTo: 'chart',
             type: 'column',
             width: 450
         },
         title: {
             text: 'A glance overview at your contest’s status'
         },
         xAxis: {
             categories: ['Approved Photos', 'Pending Approval Photos', 
                          'Votes', 'Entrants'],
             labels: {
                 //rotation: -45,
                 style: {
                     font: 'normal 9px Verdana, sans-serif, arial'
                 }
             }
         },
         yAxis: {
             allowDecimals: false,
             min: 0,
             title: {
                 text: 'Amount'
             }
         },
         legend: {
             enabled: false
         },
         series: []
     };
     series = {
         name: "Amount",
         data: [],
         dataLabels: {
             enabled: true,
             color: '#000000',
             align: 'right',
             x: -10,
             y: 20,
             formatter: function () {
                 return this.y;
             },
             style: {
                 font: 'normal 13px Verdana, sans-serif'
             }
     }
 };

The data is set this way:

for (var i in Data) {
  if (parseInt(Data[i]) != 0) {
    series.data.push(parseInt(Data[i]));
  } else {
    series.data.push(null);
  }
}
options.series.push(series);
chart = new Highcharts.Chart(options);

How can I dynamically set different colors for each data point in this loop?

Here is another solution with the latest version of Highcharts (currently 3.0).

Set the colorByPoint option to true and define the color sequence that you want.

options = {
    chart: {...},
    plotOptions: {
        column: {
            colorByPoint: true
        }
    },
    colors: [
        '#ff0000',
        '#00ff00',
        '#0000ff'
    ]
}

Here is an example based upon Highcharts Column with rotated labels demo

When you add the value to the series.data you can also set the color using the point options e.g

series.data.push({ y: parseInt(Data[i]), color: '#FF0000' });

For more details about the point options see https://api.highcharts.com/class-reference/Highcharts.Point#color

Try either of these approaches:

Approach 1:

Highcharts.setOptions({ colors: ['#3B97B2', '#67BC42', '#FF56DE', '#E6D605', '#BC36FE'] });

Approach 2:

var colors = ['#3B97B2', '#67BC42', '#FF56DE', '#E6D605', '#BC36FE', '#000'];

 $('#bar_chart').highcharts({
        chart: {
            type: 'column'              
        },
        title: {
            text: ''
        },
        subtitle: {
            text: ''
        },
        xAxis: {
            type: 'category'
        },
        yAxis: {
            title: {
                text: ''
            }
        },
        legend: {
            enabled: false
        },
        plotOptions: {
            series: {
                borderWidth: 0,
                dataLabels: {
                    enabled: false                       
                }
            }
        },         

        series: [{
            name: '',
            colorByPoint: true,
            data: [{
                name: 'Blue',
                y: 5.78,
                color: colors[0]

            }, {
                name: 'Green',
                y: 5.19,
                color: colors[1]

            }, {
                name: 'Pink',
                y: 32.11,
                color: colors[2]

            }, {
                name: 'Yellow',
                y: 10.04,
                color: colors[3]

            }, {
                name: 'Purple',
                y: 19.33,
                color: colors[4]

            }]
        }]
    });