How to change the color of each column of the same series in MSChart control?

I'm creating a bar-chart in VB6 using MSchart. It draws all the bars in the same colour. I want to have each bar in different colour (in the same series). There is only one series of data.

For example,

col1=blue
col2=red
col3=green
col4=yellow

I would really appreciate if someone could help me with a clear answer.

Thanks