The flag of Papua New Guinea consists of two equal-sized, overlapping triangles. The top half is black, while the bottom half is red. A white five-pointed star is located in the center of the flag. The aspect ratio of the flag is 3:4. The measurements of each triangle are not specified officially, but typically the black triangle is equilateral and the red triangle is isoceles with its height equal to that of the black triangle. The color codes for the flag are:

• Black: RGB(0, 0, 0) or CMYK(0, 0, 0, 100)
• Red: RGB(255, 0, 0) or CMYK(0, 100, 100, 0)
• White: RGB(255, 255, 255) or CMYK(0, 0, 0, 0)

There are no other geometric properties or patterns on the flag.