Use VBA to change colors of slide elements in Powerpoint 2013

I have a 150-slide powerpoint presentation that I want to revise due to a company rebranding effort. Our previous turquoise color has been used on text, lines, shapes and shape fills. I would like to build a VBA script that runs across the entire presentation, and in one fell swoop amends all slides and replaces this bluish color with our new dark gray color.

The old corporate color was RGB(0, 176, 240) - turquoise

The new corporate color is RGB(71, 67, 65) - dark gray

I have tried a multitude of different vba's across the internet but can't get it to work properly. Here is a screenshot of a typical slide from the old color - all the blue items should be changed to dark gray:

This piece of VBA code from a helpful forum member worked really well for shape fills - if this could be re-worked to include any text and shape outlines and lines as well, it would be perfect.

Sub ChangeShapeColor()

    Dim oSh As Shape
    Dim oSl As Slide

    ' Look at each slide in the current presentation:
    For Each oSl In ActivePresentation.Slides

        ' Look at each shape on each slide:
        For Each oSh In oSl.Shapes

            ' IF the shape's .Fill.ForeColor.RGB = turqoise color:
            If oSh.Fill.ForeColor.RGB = RGB(0, 176, 240) Then

                ' Change it to corporate dark grey:
            oSh.Fill.ForeColor.RGB = RGB(71, 67, 65)

            End If

        Next oSh

    Next oSl

End Sub

Thanks in advance,

This should get you a step closer, though I'd probably rewrite it as a function that you could pass lFindColor and lReplaceColor to.

Sub ReplaceColors()

    Dim lFindColor As Long
    Dim lReplaceColor As Long
    Dim oSl As Slide
    Dim oSh As Shape
    Dim x As Long

    lFindColor = RGB(255, 128, 128)
    lReplaceColor = RGB(128, 128, 255)

    For Each oSl In ActivePresentation.Slides
        For Each oSh In oSl.Shapes
            With oSh

                ' Fill
                If .Fill.ForeColor.RGB = lFindColor Then
                    .Fill.ForeColor.RGB = lReplaceColor
                End If

                ' Line
                If .Line.Visible Then
                    If .Line.ForeColor.RGB = lFindColor Then
                        .Line.ForeColor.RGB = lReplaceColor
                    End If
                End If

                ' Text
                If .HasTextFrame Then
                    If .TextFrame.HasText Then
                        For x = 1 To .TextFrame.TextRange.Runs.Count
                            If .TextFrame.TextRange.Runs(x).Font.Color.RGB = lFindColor Then
                                .TextFrame.TextRange.Runs(x).Font.Color.RGB = lReplaceColor
                            End If
                        Next
                    End If
                End If
            End With
        Next
    Next

End Sub