If you want to do cell highlighting, that would require some JS and CSS. I would use the code found in the splunk 6.x dashboard examples app: https://splunkbase.splunk.com/app/1603/. The app contains some neat dashboard customizations that are pretty cool. Typically, if you are using the drill-down feature in your table, specifically for that field, by default the URLS should already be blue: http://docs.splunk.com/Documentation/Splunk/6.4.1/Viz/Dynamicdrilldownindashboardsandforms. Finally, you could change the font-color, by doing an inspect element to find the id or class and overriding the default color with css.
Quick question about this ... in the js script:
// Update the cell content
$td.text(value.toFixed(2)).addClass('numeric');
Does this mean it can only apply to numeric values/fields? What if I want to compare strings, such as OK or ERROR?
Thanks ...