The flag of Sudan has a horizontal tricolor design with stripes of red, white, and black. There is a green isosceles triangle on the hoist side pointing into the center of the flag. The aspect ratio of the flag is 1:2.

Color codes:

• Red: Pantone 186 C, HEX #CE1126
• White: Pantone Safe, HEX #FFFFFF
• Black: Pantone Black C, HEX #000000
• Green: Pantone 347 C, HEX #007A3D

Geometric properties: The height of the isosceles triangle (green) is equal to the height of the flag, while its base length is half the height. The stripe widths are equal, each occupying one-third of the flag's height.