Most common flag colors

Steve Faeembra created this infographic to show which international flag colors are the most popular.

Red, white, and blue and not only the most popular individual colors, but they're also the most popular colors in combination with each other. According to Wikipedia, there are over 30 countries and territories with red, white, and blue flags:

 Australia  Cambodia  Chile  Cook Islands   Costa Rica  Cuba  Croatia  Czech Republic  Dominican Republic  Faroe Islands  Fiji  France  Iceland  Laos  Liberia  Luxembourg  Nepal  Netherlands  New Zealand  North Korea  Norway  Panama  Paraguay  Puerto Rico  Russia  Samoa  Sint Maarten  Slovakia  Slovenia  Taiwan  Thailand  United Kingdom  United States

via Geekosystem

Wikipedia: List of countries by colors of national flags