Hi
if what you are trying to do is to change a cell's fill when you type in a value in that cell if it was previously blank, then I don't think you can do that with conditional formatting as that only relates to current values. You can approximate it with VBA for the sheet you are working in with selection change and worksheet change events, though I must admit I don't like these as they tend to be unstable.
Try this and see if it works
right click on the name tab of the sheet you at working in and select View Code, then past this code on the VBA sheet. It should change the colour of every cell changed from blank to a value
Dim OldVal
Public Sub Worksheet_SelectionChange(ByVal Target As Range)
OldVal = Target.Value
End Sub
Public Sub Worksheet_Change(ByVal Target As Range)
If OldVal = "" And Target <> "" Then Target.Interior.Color = RGB(255, 130, 50)
End Sub
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