VBA code to change row color when value in column A changes

Question

My spreadsheet is set up like this:

I have a list of job numbers in column A and a corresponding list of Job titles in Column B. I need for all of the rows of a certain job number to be colored. e.g., rows 2-4 have "3705" in column A, so those rows would be colored red. Rows 5 & 6 have 4169 in column A and would be colored green. Rows 7-10 have 5518 in column A and would be colored red (alternate between red and green).

Can someone give me a VBA code that will do what I described above automatically/using a macro?

Thanks!!

Solution 1

Sub colorize()

Dim r As Long, val As Long, c As Long

    r = 1
    val = ActiveSheet.Cells(r, 1).Value
    c = 4 '4 is green, 3 is red '

    For r = 1 To ActiveSheet.Rows.Count
        If IsEmpty(ActiveSheet.Cells(r, 1).Value) Then
            Exit For
        End If

        If ActiveSheet.Cells(r, 1).Value <> val Then
            If c = 3 Then
                c = 4
            Else
                c = 3
            End If
        End If

        ActiveSheet.Rows(r).Select
        With Selection.Interior
            .ColorIndex = c
            .Pattern = xlSolid
        End With

        val = ActiveSheet.Cells(r, 1).Value
    Next

End Sub

Add the following to the relevant Worksheet's module if you want the macro to fire every time a cell in column A changes value:

Private Sub Worksheet_Change(ByVal Target As Range)

    If Intersect(Target, Range("A:A")) Is Nothing Then
        Exit Sub
    End If

    colorize

End Sub

Solution 2

This can be done using only Excel formulas and conditional formatting if you can add a column. You might not be able to alternate red/green, but only a color and no color.

Alternate Excel Row Color Based on Content