IF statement based on CELL fill or no fill

Hello all,

I’m having a hard time coming up with a specific line of code in my update macro.

I want an IF statement that is true when the cell has no fill, but false if it has any color fill.

This is what I have so far:

If selection.interior.pattern = xlBlank Then
    
    ActiveSheet.Paste
    Sheets("ENTRY").Select
    Range("B6:B8").Select
    Application.CutCopyMode = False
    Selection.ClearContents
    Range("B6").Select

    Else
    Sheets("ENTRY").Select
    Application.CutCopyMode = False
    Range("B6").Select
    MsgBox ("Error: Invalid date. Either Holiday or Weekend.")

    End If

Using the current formula, the IF statement is always true even when there is a colored fill in the cell.
BTW the fill is based on conditional formatting, don't know if that matters or not.

Any help would be greatly appreciated.

-Oli