Hi Markus,
You can use a third column to specify a color index so that each bar has a different color, such as in the image pasted below.
> Add a third col (Col(C) in this example) > Make the bar graph with Col(A) and Col(B) > Bring up Plot Details - right-click on graph and select Plot Details from context menu > Go to Patterns Tab and click on Fill Color > Select Indexing from Drop-down, and then Col(C)
Easwar OriginLab.
![](http://www.OriginLab.com/ftp/forum_and_kbase/images/forum_bar_graph.gif)
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