Set all sheets' fill color to "No Fill" using VBA in excel

I used "0" in my code (see below) working with Excel 2016 and it turned my columns black.

Master.Columns(Col_Start).Interior.Color = 0

Using "xlNone" per below, however, did work for me.

Master.Columns(Col_Start).Interior.Color = xlNone 

Untested but should do the job:

Sub No_Fill_Wb()

Dim ws as worksheet

For each ws in Thisworkbook.Worksheets
    ws.Cells.Interior.ColorIndex = 0
Next ws

End Sub