What I would like to do is have a conditional format which looks at the
value of the cell then find the matching value on the WorkShifts Monday
worksheet (that value would be found in column A and then when it finds that
look at Column U. If the value in column U is "Large" I want to set the cell
shading to blue ( I know how to set the format if the condition is met it is
everything before that I can not figure out).

The range for WorkShifts Monday worksheet is A3:U120. I am assuming that
this would require there to be some sort of VLookUp as part of the
conditional forma.