To Set Up A Condition Is Vba

Been teaching myself VBA and I've gotten stuck, and no matter how I search I can't seem to find an answer...

Trying to set up a condition is vba where if a cell value minus another cell value is greater than a static value (elsewhere in the sheet), then to turn the font green.

Code so far:


Dim Cval As Integer
Cval = Cells(3, 6).Value
FinalRow = Cells(65536, Cval).End(xlUp).Row
For i = 10 To FinalRow
If Cells(i, Cval) - Cells(i, Cval + 1) > R6C5 Then
With Cells
.Font.ColorIndex = 10
.Font.Bold = True
End With
End If
Next i
End Sub

I can't work out the right sintax to get a if condition to work correctly.

I have gotten this to work with conditional format, but if you want to copy/paste elsewhere, it doesn't paste the format result correctly...