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Ashkenazic Jews or Ashkenazim,[a] constitute a Jewish diaspora population that emerged in the Holy Roman Empire around the end of the first millennium CE.[8] They traditionally spoke Yiddish[8] and largely migrated towards northern and eastern Europe during the late Middle Ages due to persecution.
https://en.m.wikipedia.org/wiki/Ashkenazi_Jews
The “Poland-Lithuania” that most of these migrations went to, at the time included large portions of present day Ukraine, Belarus and Russia. The regions with the highest Jewish populations prior to WW2, seem to match the borders of the polish-lithuanian commonwealth before it was partitioned by their neighbours in the 18th century. https://en.m.wikipedia.org/wiki/Partitions_of_Poland
I’m red green colorblind as well. I just see the background as white or a very light shade of grey. Someone else has made a post with a yellow can and in that one I see the background as yellow (which is basically the same as green to me, I have very little r in my rgb), especially the right side of the can.