Most of you have probably have read the Altiris KB article 34253 for customizing the Incident Grid.
The one thing they don't mention is what format the coloring they have in there is. Most HTML or Web coding uses HEX coloring, like White is #FFFFFF, however for this you have to Convert HEX to Decimal.
Simply open up your calculator, switch to Scientific mode. Then, click HEX, insert the color you want, like #666666 (Grey) then click Decimal and "BAM!" it converts it to 6710886, which the JAVA Script can then read. Now you are free to use all the pretty colors you want in the helpdesk grid. :)