Do you mean red white and green? If so it's the Spanish flag, but a red white and red flag is the Austria flag.
That's the Italian flag (not to be confused with the Irish flag, which has horizontal green, white, and orange stripes). On the Italian flag, the order of the strips (left to right) is green, white, red.
White blue and red horizontal stripes
Civil and State flag, Red/White/Red horizontal stripes
There are two "whites" on the current American flag: The 50 stars and six stripes. The six white stripes are horizontal from the left to the right on the flag separated by red stripes. White typically stands for "purity."
The flag of Serbia.
horizontal white, blue and red stripes with coat of arms
Three horizontal stripes: red white and blue top to bottom
Sierra Leone
it stands for purity The American Flag consists of seven horizontal red stripes and six horizontal white stripes. The total number of stripes equals 13 and represents the thirteen original colonies which rebelled against British rule.
it has nine equal horizontal stripes of blue alternating with white.
It is the flag of Belarus from 1991 to 1995 It could also be the flag of Amazonas, a Brazilian state
From top to bottom, the Russian flag has horizontal stripes of white, blue and red.