[issue42541] Tkinter colours wrong on MacOS universal2

[E. Paine]

Change by E. Paine <paineelisha at gmail.com>:


Added file: https://bugs.python.org/file49646/Screenshot-2020-12-02-at-12-46-06.png

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42541>
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