Multiple Colors For Different Status in Column Chart

I have requirement to fetch the status of requests from database and display with different color based upon status. I am using column chart and displaying the data but while providing the color for different status column i am facing problem. 

Below is some sample code:

a!columnChartField(
categories: {"Open","Started","In-Progress","Closed"},
series: {
a!chartSeries(
label: "Request Entries",
data: {10,20,30,40,50}

)
},
stacking: "NORMAL",
yAxisTitle: "Request Entries",
showLegend: false,
showTooltips: true
)

Here since i am using single chart series component i am facing problem while passing different colors for status. If am using different chart series i am not getting status labels exactly below status columns.

Can anyone help to resolve this issue.

Thanks in Advance!