The flag of Gambia consists of three horizontal stripes of equal width and a vertical red stripe on the hoist side. The aspect ratio is 2:3. The colors and their respective HEX color codes are:

1. Red (#CE1126) - vertical stripe at the hoist, occupying 1/6th of the flag's length.
2. Blue (#0000CD) - central horizontal stripe, occupying 1/3rd of the flag's height.
3. Green (#3C9B35) - top and bottom horizontal stripes, each occupying 1/3rd of the flag's height.

The red stripe is separated from the blue and green stripes by thin white fimbriations, which have a width equal to 1/30th of the flag's height.