How is it that large geographic regions have very similar designs/color schemes in their flags? I’m specifically thinking of the Arab states and many African nations | AskHistorians Archive Observer

How is it that large geographic regions have very similar designs/color schemes in their flags? I’m specifically thinking of the Arab states and many African nations

by wholock1729

cchiu23

https://www.reddit.com/r/AskHistorians/comments/8elkys/why_do_many_arab_nations_have_red_white_and_green/

/u/Aleksx000 talks about the common themes among arabic flag colours here

https://www.reddit.com/r/AskHistorians/comments/7uw5rk/why_do_so_many_countries_within_the_middle_east/

This answer has a bit on africa