You are correct that I didn't understand the formula for writing IIF statements.  I'm not an IT person by trade and have been trying to learn how to generate SQL reports...

I have tried it.  I didn't work.  I've tried a lot of variations and still can't get it to color code correctly.

I've also tried:

IIF(("d",Fields!NextActionDueBy.Value<today(),"red", IIF("d",Fields!NextActionDueBy.Value>=now()+30,Fields!NextActionDueBy.Value+60),"yellow")