Romania
Liechtenstein's flag is blue in the top half and red in the bottom half. There is also a yellow/gold crown in the blue part.
Croatian.
Norway
Bangladesh
Several countries have a blue, yellow, red, and white flag:KiribatiCape VerdeMalaysiaPhilippinesSerbiaSloveniaTuvaluIn addition, the Buddhist flag is blue, yellow, red, and white.
the colors of the french flag is blue, white , red. Haiti is a francophone country(french speaking country) it is red and blue and has a little sequence in it that's what haitis flag look like
france France
The country with a white and black flag featuring a red and blue ball is South Korea. The flag, known as the Taegukgi, consists of a white background, a red and blue yin-yang symbol in the center, and four black trigrams at each corner. The red and blue symbol represents balance and harmony in the universe.
The country with a red, blue, and gray flag is the flag of the Republic of Crimea, a region within Ukraine that was annexed by Russia in 2014. The flag features horizontal stripes of red, blue, and gray. However, if you're referring to a national flag, there isn't a recognized sovereign nation with a flag that exactly fits that description.
Colombia-South America
Chile