Apply conditional formatting using VBA

Dear Experts:

The below macro enters the following formula into row 5 of the chosen formula column.

=IF(A5<>SUM(E5:G5);"Caution!";"ok") 'see line 6 of the code

The second inputbox prompts the user to enter another column letter which determines the number of rows the formula is copied down.

The macro then enters the formulas into all worksheets with the exception of a couple of them.

NOW, I also would like to apply conditional formatting to the entered formulas, i.e.

All Cells which have been filled with the term 'Caution!" should get a fill RGB 220, 17, 17 coupled with a white font

Help is much appreciated. Thank you very much in advance.

Regards, Andreas

Sub Enter_Formula_Multiple_Worksheets()
Dim ws As Worksheet
Dim rng As Range
Dim lr As Long, Col As Long
Dim Formula As String
Formula = "IF(A5<>SUM(E5:G5),""Caution!"",""ok"")"
Dim ColNameFormula As String
Dim ColNameCopyingDown As String

ColNameFormula = InputBox("Choose column letter where the formula will be entered", "Set Column Letter for formula")
If ColNameFormula = "" Then
MsgBox "You didn't select a column letter.", vbExclamation
Exit Sub
End If

ColNameCopyingDown = InputBox("Choose column letter to determine the number of copying down actions of the formula", "Set Column Letter")
If ColNameCopyingDown = "" Then
MsgBox "You didn't select a column letter.", vbExclamation
Exit Sub
End If

Application.ScreenUpdating = False
For Each ws In Worksheets
    Select Case ws.Name
         Case "1_Index", "2_Auswertung", "3_Gesamtliste", "X_Sorting", "Y_ColumnHeader", "Z_Requirements"
        
        Case Else
            lr = ws.Cells(Rows.Count, Range(ColNameCopyingDown & 1).Column).End(xlUp).Row
            If lr > 4 Then
                ws.Range(ws.Cells(5, Range(ColNameFormula & 1).Column), ws.Cells(lr, Range(ColNameFormula & 1).Column)).Formula = "=" & Formula
            End If
    End Select
    lr = 0
Next ws
Application.ScreenUpdating = True
End Sub