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Your challenge this week is to choose only black and white (and maybe gray) objects, and compose a still life with them to paint. Obviously you'll probably still find some colors in there, but they'll most likely be muted.
An option to this challenge is to paint any black and white subject - it doesn't have to be a still life. Have fun!
Please be sure to follow the spirit and the letter of the challenge.
For example, each submission must be painted after the challenge is posted.