Fix #957 (#960)

Round RGB values to integers for creating the `wx.Colour`

CHANGES.rst

@@ -62,7 +62,7 @@ Changes in this release include the following:
 * Switch wx.lib.plot to issue deprecation warnings with PlotPendingDeprecation
   so it doesn't have to enable all warnings to get them to be shown by default.
   (#902)
-  
+
 * Added a Python 3.7 builder on Fedora 28. (#925)
 
 * Fix the object ownership transfer for wx.Menu.Insert() (#931)
@@ -89,7 +89,7 @@ Changes in this release include the following:
 * Fix missing parameter tool_id in
   wx.lib.agw.ribbon.toolbar.RibbonToolBar.AddToggleTool. (#947)
 
-* Add a step to wx.Config.ReadInt to attempt converting from long to int 
+* Add a step to wx.Config.ReadInt to attempt converting from long to int
   under python2. (#384)
 
 * Add virtual behavior for wx.RichTextCtrl and wx.TextCtrl's Copy/Cut/Paste methods
@@ -97,6 +97,10 @@ Changes in this release include the following:
 
 * Fix IO type in wx.lib.agw.thumbnailctrl  (#959)
 
+* Fix type error that would occur using pycolourchooser. (#957)
+
+
+
 4.0.3 "The show must go on. (Die show-stoppers! Die!)"
 ------------------------------------------------------
 * 25-June-2018

wx/lib/colourchooser/pycolourchooser.py

@@ -363,9 +363,11 @@ class PyColourChooser(wx.Panel):
         # Allow values to go full range from 0 to 255
         r, g, b = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2])
 
-        r *= 255.0
-        g *= 255.0
-        b *= 255.0
+        round_tenths = lambda x: int(x + 0.5)
+
+        r = round_tenths(r * 255.0)
+        g = round_tenths(g * 255.0)
+        b = round_tenths(b * 255.0)
 
         return wx.Colour(r, g, b)