#Color 01
rownumber = 1

for row in sheet.iter_rows(min_row=2, max_row= sheet.max_row, min_col=1, max_col=4, values_only=True):
    rownumber += 1
    for cell in row:
      if cell is not None and ('Item1','Item2') in str(cell):
        for row2 in sheet.iter_rows (min_row=rownumber, max_row=rownumber, min_col=1, max_col=12):
            for cell1 in row2:
              cell1.fill = color1_fill