Once a Tab object is returned, you can use the ColorIndex property determine the settings of a tab for a chart or worksheet.
In the following example, Microsoft Excel determines if the worksheet's first tab color index is set to none and notifies the user.
Visual Basic for Applications
' Determine if color index of 1st tab is set to none.
If Worksheets(1).Tab.ColorIndex = xlColorIndexNone Then
MsgBox "The color index is set to none for the first " & _
MsgBox "The color index for the tab of the first worksheet " & _
"is not set none."