The flag of Belgium consists of three vertical stripes of equal width. The colors from left to right are black, yellow, and red. The aspect ratio of the flag is 13:15, meaning that its width is 13 units and its length is 15 units. The geometric properties of the flag are rectangular with sharp right angles. The color codes for the flag are:

• Black: #000000
• Yellow: #FEDF00
• Red: #FF0000