当我保存openpyxl时，它会改变所有行/列/文本的颜色

from openpyxl import Workbook
from openpyxl.styles import PatternFill

# 创建一个新的工作簿
wb = Workbook()

# 选择活动工作表
ws = wb.active

# 设置行的颜色
row_fill = PatternFill(start_color="FF0000", end_color="FF0000", fill_type="solid")
ws["A1"].fill = row_fill

# 设置列的颜色
column_fill = PatternFill(start_color="00FF00", end_color="00FF00", fill_type="solid")
ws["B:B"].fill = column_fill

# 设置单元格的颜色
cell_fill = PatternFill(start_color="0000FF", end_color="0000FF", fill_type="solid")
ws["C3"].fill = cell_fill

# 保存Excel文件
wb.save("example.xlsx")