Formatting issue of SSRS report -Urgent Help required

I have a requirement for my SSRS Table report which states the following:

In the Planned GoLive column, highlight the dates with orange colour if report execution date (or current date) is ≥ 7 days past Planned GoLive date

 Example :  If Planned GoLive Date is Nov 05, 2013 and we execute the report today, it should be highlighted in Orange.

Could you please help me with the SSRS expression for this scenario .

Thanks

Ajit