South Africa Flag Postcard The South African flag is a horizontal bicolour with an triangle on the left and a Y-shaped band over the flag. The used colors in the flag are blue, green, red, yellow, white, black. The proportion of the South African flag is 2:3. The Flag of South Africa was adopted in 1994. The first use of the current flag design was in 1994. The last change to the current South African flag design was in 1994.