You can only color data by series.  If you want different colors for bars, 
you have to assign those values to different series, which can be handled 
with a DataView using calculated columns.  You then need to set the 
"isStacked" option to true and draw the chart based on the DataView.  I 
wrote a demo script for this that you can base your's off of: 
http://jsfiddle.net/asgallant/QHJA6/ 

On Tuesday, August 7, 2012 12:30:11 PM UTC-4, Lumière wrote:
>
> I also tried this:
>        colors: ['black','blue','white','blue','blue','blue','blue']
>
> But none of the above work.
>

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