You can expand the expression on the Expressions tab and set the Background and Text colours.
See the attached example where I change the colour to red if the Dept = 'IT'.
Hope this helps.
Test Highlight.qvw 137.5 K
Sorry for not replying sooner! The project I was working on has temporarily been put on hold. At the time, I looked at the QV file and couldn't find what you mentioned in there. I tried replicating the solution myself in what I was working on, but again to no avail.
When I come back to it, I'll spend a little more time trying to get it working again. Thank you for your response though!