Own RGB colour not working on CANVAS!


I add to wx.ColourDatabase object my own custom color wx.Colour(255, 220, 210) with my own colour name, and when I want to use it to Fill Polygon on Canvas then instead of my new colour is displayed black. I tried to use wx.lib.colourdb.updateColourDB() but still is black. Is there a problem with custom colors not included in the color list in the ColourDB wx-demo? Below how it looks like. How to manage with own colour pallete on canvas ?

Thanks for any help.