DashBoard has its own mechanism for styling that is *somewhat* CSS-like.
When you are in Edit Mode and double-click on a table, you will see a "style" tab for the overall table. You'll also see a way to set style information for even rows vs. odd rows and selected rows vs. unselected rows.
If those don't get you what you're looking for, you can also specify a parameter to contribute styles for each row in your table - in this case, you would use a string array with style information for the background, foreground, etc. for each row and, in the "config options" section of the editor (again, double-click on the table while the panel is edit mode), add w.rowstyleparam
<abs contexttype="opengear">
<meta>
<params>
<param access="1" maxlength="0" name="Column 1" oid="params.col1" precision="0" type="STRING_ARRAY" widget="default">
<value>a</value>
<value>b</value>
<value>c</value>
<value>d</value>
<value>e</value>
<value>f</value>
<value>g</value>
<value>h</value>
</param>
<param access="1" maxlength="0" name="Column 2" oid="params.col2" precision="0" type="STRING_ARRAY" widget="default">
<value>a2</value>
<value>b2</value>
<value>c2</value>
<value>d2</value>
<value>e2</value>
<value>f2</value>
<value>g2</value>
<value>h2</value>
</param>
<param access="1" constrainttype="STRING_CHOICE" name="Table" oid="table" precision="0" type="INT16" value="7" widget="table">
<constraint>params.col1</constraint>
<constraint>params.col2</constraint>
</param>
<param access="1" maxlength="0" name="Styles" oid="params.styles" precision="0" type="STRING_ARRAY" widget="default">
<value>t:bg#FF0000;f:bg#000000;fg#FFFFFF;</value>
<value>t:bg#00FF00;f:bg#111111;fg#FFFFFF;</value>
<value>t:bg#0000FF;f:bg#222222;fg#FFFFFF;</value>
<value>t:bg#FFFF00;f:bg#333333;fg#FFFFFF;</value>
<value>t:bg#FF00FF;f:bg#444444;fg#FFFFFF;</value>
<value>t:bg#FF0000;f:bg#555555;fg#FFFFFF;</value>
<value>t:bg#00FF00;f:bg#666666;fg#FFFFFF;</value>
<value>t:bg#0000FF;f:bg#777777;fg#FFFFFF;</value>
<value>t:bg#FFFF00;f:bg#888888;fg#FFFFFF;</value>
</param>
</params>
</meta>
<tab height="277" left="22" top="24" width="511">
<param expand="true" height="212" left="12" name="Blank (No Style)" oid="table" showlabel="false" top="16" width="357"/>
<param evenstyle="f:bg#212121;f:fg#E7E7E7;t:bg#selectbg;t:fg#selectfg;" expand="true" height="212" left="12" name="Even/Odd" oddstyle="f:bg#676767;f:fg#FFFFFF;t:bg#selectbg;t:fg#selectfg;" oid="table" showlabel="false" style="bg#000000;" top="16" width="357"/>
<param expand="true" height="212" left="12" name="Each Row" oid="table" showlabel="false" top="16" width="357">
<config key="w.rowstyleparam">params.styles</config>
</param>
</tab>
</abs>#DashBoard