An interesting exercise is to look at the number of colors in the flags of nations (member states of the UN). While one such partially curated list is available on Wikipedia, it is not comprehensive and leaves out many nations. With some manual content curation and some automated curation from the aforementioned list, a comprehensive list is created. The graph below shows the distribution of flags by the number of colors on the flag.

With the regime change in Libya, there is no nation with a single colored flag. A nation’s flag is most likely to have 3 colors in it. While most nations have simple color schemes, some do have insignia’s with changing/fading hues, in such cases the number of colors is essentially not finite and all such flags are clubbed under 12+ category. The choice of the maximum limit to be kept at 12 is due to the flag of San Marino which has exactly 12 colors in it. Attached is the raw data and the associated notes for the interested.

Compiled data