Expression for changing text box color

I am using Access 2007 and I would like to change the color of a text box based on the information in it.

For instance (this is a church database), if one of the member is deceased, I would like to gray the text boxes for all their information.

I am not good with code so I figured I would just use an IF/THEN expression, but I'm not sure I understand when to use quotes or double quotes, IIF or IF, etc etc. Is there a guide or can someone help with this?

Thanks