Hi,try this:
1- order the results by severity. i.e. | order severity
2- use the seriesColors property to assign a color to each severity. You will have to write the colors in the same order as the severity values are listed in your results.
<option name="charting.seriesColors">[0xFF9900,0x00CC00]</option>
3- get rid of "other" in pie chart.
<option name="charting.chart.sliceCollapsingThreshold">0</option>
Let me know if it works! Cheers,
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