How do I add cells with the same background color?

jmbcb,

Here is one possible way to achieve your goal. First, start by creating this Sub in VBA (Press Alt+F11, right click "ThisWorkbook", Insert > Module, then copy and paste the following):

     Sub SameColor()

          Function ColorSum(CellColor As Range)
          ColorSum = CellColor.Interior.ColorIndex

     End Function

Next, create a new column in column C named ColorSum. In cell C2 put the formula =ColorSum(A2) and copy this formula down to C6. You should get values of 23, 40, 40, 50, 50 in cells C2:C6, respectively.

Finally, in cells B8:B10 put the following formulas:

Cell B8: =SUMIF($C$2:$C$6,ColorSum($A$5),$B$2:$B$6)

Cell B9: =SUMIF($C$2:$C$6,ColorSum($A$3),$B$2:$B$6)

Cell B10: =SUMIF($C$2:$C$6,ColorSum($A$2),$B$2:$B$6)

Now, I must warn you that this solution is set up specifically to solve the problem the way you have it designed. If you change the colors of cells A2:A6, or add more cells to the list, this solution may not work for you (i.e. it is not dynamic).

Hope this helps!
PReagan