How to customize x-axis value to have different static color?

[karu0711]

I want x-axis value to have different static color. how do I customize? 

[karu0711]

<panel>
<title>Security Flaws by Severity</title>
<chart>
<search>
<query>| inputlookup Veracode.csv | fields Severity | eval count = 0
| join type=left Severity
[|search index="veracode_test" sourcetype="Veracode_scan" | lookup Veracode.csv findings{}.severity | stats count by Severity]</query>
<earliest>0</earliest>
<sampleRatio>1</sampleRatio>
</search>
<option name="charting.axisLabelsX.majorLabelStyle.overflowMode">ellipsisNone</option>
<option name="charting.axisLabelsX.majorLabelStyle.rotation">0</option>
<option name="charting.axisTitleX.text">Risk</option>
<option name="charting.axisTitleX.visibility">visible</option>
<option name="charting.axisTitleY.visibility">visible</option>
<option name="charting.axisTitleY2.visibility">visible</option>
<option name="charting.axisX.abbreviation">none</option>
<option name="charting.axisX.scale">linear</option>
<option name="charting.axisY.abbreviation">none</option>
<option name="charting.axisY.scale">linear</option>
<option name="charting.axisY2.abbreviation">none</option>
<option name="charting.axisY2.enabled">0</option>
<option name="charting.axisY2.scale">inherit</option>
<option name="charting.chart">column</option>
<option name="charting.chart.bubbleMaximumSize">50</option>
<option name="charting.chart.bubbleMinimumSize">10</option>
<option name="charting.chart.bubbleSizeBy">area</option>
<option name="charting.chart.nullValueMode">gaps</option>
<option name="charting.chart.showDataLabels">none</option>
<option name="charting.chart.sliceCollapsingThreshold">0.01</option>
<option name="charting.chart.stackMode">default</option>
<option name="charting.chart.style">shiny</option>
<option name="charting.drilldown">none</option>
<option name="charting.layout.splitSeries">0</option>
<option name="charting.layout.splitSeries.allowIndependentYRanges">0</option>
<option name="charting.legend.labelStyle.overflowMode">ellipsisMiddle</option>
<option name="charting.legend.mode">standard</option>
<option name="charting.legend.placement">right</option>
<option name="charting.lineWidth">2</option>
<option name="trellis.enabled">0</option>
<option name="trellis.scales.shared">1</option>
<option name="trellis.size">medium</option>
</chart>
</panel>
</row>
<row>