VBA to change colors

Hi Guys, what would be the code for

If Range(S6:S450) >=38.75 then VB red, else VB white

If (S6:S450) >=38.75 then Range(B6:B450)VB red, else VB white

I need the code to activate these 2 columns depending on Column S values

I did this with conditional format but it slows down my sheet operation.
rsen1Asked:
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Patrick MatthewsCommented:
It's unlikely that VBA will be faster than Conditional Formatting.  Indeed, it would probably be slower to use VBA with a Change or Calculate event sub than to just use CF.
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rsen1Author Commented:
Thank you for your response, but would you please help me with code all the same?
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Patrick MatthewsCommented:
I still think that this is a bad idea, but if you insist, this goes in the sheet module for the worksheet you need to "watch":


Option Explicit

Private Sub Worksheet_Calculate()
    
    ApplyColors
    
End Sub

Private Sub Worksheet_Change(ByVal Target As Range)
    
    If Not Intersect(Target, Me.[s6:s450]) Is Nothing Then
        ApplyColors Intersect(Target, Me.[s6:s450])
    End If
    
End Sub

Private Sub ApplyColors(Optional rng As Range)
    
    Dim UseThisRange As Range
    Dim cel As Range
    
    Const Threshold As Double = 38.75
    
    Application.EnableEvents = False
    
    If Not rng Is Nothing Then
        Set UseThisRange = rng
    Else
        Set UseThisRange = Intersect(Me.UsedRange, Me.[s6:s450])
    End If
    
    For Each cel In UseThisRange.Cells
        If cel >= Threshold Then
            cel.Interior.Color = vbRed
            Me.Cells(cel.Row, "b").Interior.Color = vbRed
        Else
            cel.Interior.ColorIndex = xlColorIndexNone
            Me.Cells(cel.Row, "b").Interior.ColorIndex = xlColorIndexNone
        End If
    Next
    
    Application.EnableEvents = True
    
End Sub

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Keep the Change event if the values in S will change by manual entry, and the Calculate event if they will change by formula recalculation.
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rsen1Author Commented:
Thank you very much
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