wxpython Ultimatelistctrl，如何更改选中项目的颜色？

import wx
import wx.lib.agw.ultimatelistctrl as ULC

class MyListCtrl(ULC.UltimateListCtrl):
    def __init__(self, parent):
        ULC.UltimateListCtrl.__init__(self, parent, -1, agwStyle=wx.LC_REPORT | wx.LC_VRULES | wx.LC_HRULES)

def OnItemSelected(self, event):
    selected_item = event.m_itemIndex
    self.SetItemBackgroundColour(selected_item, wx.Colour(255, 0, 0))  # 设置选中项目的背景颜色为红色
    event.Skip()

class MyFrame(wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__(self, parent, title="Ultimatelistctrl Demo")
        
        panel = wx.Panel(self)
        list_ctrl = MyListCtrl(panel)
        
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(list_ctrl, 1, wx.EXPAND)
        panel.SetSizer(sizer)
        
        self.Bind(wx.EVT_LIST_ITEM_SELECTED, list_ctrl.OnItemSelected, list_ctrl)