How to highlight the date comparing to the previous date

[#1]

Hi all!

Can you help me in my question:

I've got a pivot table that is representing the planned date and the fact date:

DeviceA1Operationfact1234

		plan
		25.01.2012	01.03.2012
		26.01.2012	04.03.2012
		20.01.2012	28.02.2012
		05.03.2012

I want to highlight in black when

plan date<  current date & fact date is missing

and in blue

plan date<  current date&  fact date<=plan date

Please help.