Having a cell flag red (or something) when a name is listed as off.

[szm187]

So, I have a portion of the spreadsheet pulled out that can represent what I want on a basic level.

Basically, I have two columns that people's names will be put into on the left hand side.

On the right, I have a list of times people are in.

I'm going to ask two levels of questions, one I think is pretty easy, one which might be a lot more intense.

So Level 1 Question:
I would like it so that anytime a person's name is listed as "OFF" in column G that the cell they are entered in turns red or does something to signify that an off scheduled person is in the schedule. So, in the attachment, if Carl or Greg was entered in cells B2-B12 or C2-C12, that cell would turn red (or something equally significant if there's a simpler way)

Level 2 Question (And I don't know if there's an easy answer to this)
I would like it so that anytime a person's name is listed in a cell that they are not scheduled for, that the cell would turn red. Very important note, the times in column G will change often, so the question is not for just this one instance, but for any combination I would enter.

Like I said, Level 1, I'm sure there's a fairly simple answer. Level 2, not so much. If you can answer either or, your help would be very appreciated. Thanks!