Copy & paste below VBA code in your Module & use function “=CellColorIndex(A2)” in sheet.
Function CellColorIndex(InRange As Range, Optional OfText As Boolean = False) As Integer
‘This Code created by Akumar, www.99excel.com
Application.Volatile True
If OfText = True Then
CellColorIndex = InRange(1, 1).Font.ColorIndex
Else
CellColorIndex = InRange(1, 1).Interior.ColorIndex
End If
End Function