Is it possible for specific rows of a grid to use a different colour text and/or background?

The scenario is as follows:
The order entry screen for one of my clients displays all of the items that are available to be sold on pages in a page frame.
The sales rep. just keys in the quantities ordered.
I realize that we can use a checkbox in each row to indicate which rows have quantities entered.
However, the sales rep. would like these rows to be displayed in a different colour regardless of whether the row has the focus.

Any suggestions?
TIA.