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.
Several countries have a blue, yellow, red, and white flag:KiribatiCape VerdeMalaysiaPhilippinesSerbiaSloveniaTuvaluIn addition, the Buddhist flag is blue, yellow, red, and white.
Bangladesh
Croatian.
From top to bottom, the Russian flag has horizontal stripes of white, blue and red.
White, Blue & Red. The English flag is red and white. The Welsh flag is red and white. The Scottish flag is blue and white
france France
The colours of the Samoan flag are blue, red and white.
Chile
Chile
Brazil is one, there are dozens of others.
Blue, white, and red. Blue, white, and red.
The South Korean flag is black, white, blue and red. The North Korean flag is red, blue and white. The flag of the Korean Empire was white, blue and orangey red.