Notes:

  1. -depth 8 means 8 bits per RGB value
  2. 1158 is sqrt(wc -l 24jan2016-try-ig-vancouver-2015-dominant-colours.txt)
convert -depth 8  -size 1158x1158 24jan2016-try-ig-vancouver-2015-dominant-colours.rgb 1158x1158-24jan2016-try-ig-vancouver-2015-dominant-colours.png

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