Hi zd00191,
you can set the colors using the charting.seriesColors to assign a series of colors or use the charting.fieldColors option like this:
<dashboard>
<row>
<chart>
<searchString>index=_internal source=*access* | chart count by status</searchString>
<earliestTime>-60m@m</earliestTime>
<latestTime>now</latestTime>
<option name="charting.chart">pie</option>
<option name="charting.fieldColors">{200:0x00ff00,201:0x33ff00,204:0x66ff00,303:0xffaa00,304:0xffff00,404:0xff0000}</option>
</chart>
</row>
</dashboard>
to set a different colour based on the value of the status field in this example.
See the docs for more details http://docs.splunk.com/Documentation/Splunk/6.2.4/Viz/Chartcustomization#Chart_colors
cheers, MuS
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