The flag of Guyana consists of three horizontal bands of equal size. The top and bottom bands are green and the middle band is gold. There is a black, elongated triangle on the hoist side which is bordered by two white stripes. The aspect ratio of the flag is 3:5. The geometric properties of the flag include a rectangle with a width-to-length ratio of 1:1.6667. The colors used in the flag have the following color codes:

• Green: #0072c6
• Gold: #ffc726
• Black: #000000
• White: #ffffff

The width of the black triangle is one-half the length of the hoist side, and the apex of the triangle reaches to the centre of the middle, golden band.