new_contents: """Custom time picker that allows us control of the control's color."""
  from wx.lib.masked import TimeCtrl
  from ... util import rgba
  import wx
  
  
  class TimePickerCtrl(TimeCtrl):
      """Time picker that we can force proper colors on."""
  
      def __init__(self, parent, *args, **kwargs):
          """
          Initialize.
  
          Create a temporary text control so we can get proper
          background and foreground colors.
          """
  
          ctrl = wx.TextCtrl(parent)
          self._fg = ctrl.GetForegroundColour().GetRGB()
          self._bg = ctrl.GetBackgroundColour().GetRGB()
          bg = rgba.RGBA(0xFF0000)
          bg.blend(rgba.RGBA(ctrl.GetBackgroundColour().Get()), 60)
          self._error_bg = wx.Colour(*bg.get_rgb()).GetRGB()
          ctrl.Destroy()
          super().__init__(parent, *args, **kwargs)
  
      def SetParameters(self, **kwargs):
          """Force the colors we want."""
  
          if 'oob_color' in kwargs:
              del kwargs['oob_color']
          maskededit_kwargs = super().SetParameters(**kwargs)
          maskededit_kwargs['emptyBackgroundColour'] = wx.Colour(self._bg)
          maskededit_kwargs['validBackgroundColour'] = wx.Colour(self._bg)
          maskededit_kwargs['invalidBackgroundColour'] = wx.Colour(self._error_bg)
          maskededit_kwargs['foregroundColour'] = wx.Colour(self._fg)
          maskededit_kwargs['signedForegroundColour'] = wx.Colour(self._fg)
          return maskededit_kwargs
  
subject: Add custom time picker control