Brandi,
Select the cell you want to change color, from the menu:
Format -> Conditional Formatting
Change Condition 1 to:
Cell Value Is not equal to
Put your cursor in the final entry field and select the cell
you want to compare to... (ie =$C$1)
Set the format you want when the cells aren't equal
Your done...
One thing to not is that their is no margin of error for this.
If one cell is 300 and the other is 300.0000001 the cell
color will still change.
To include a margin of error. (Example leave +or- a penny)
Format -> Conditional Formatting
Change Condition 1 to:
Cell Value Is not equal to =$C$9 - 0.01 =$C$9 + 0.01
Dan E