The flag of Saint Kitts and Nevis consists of two horizontal bands of equal size. The top band is green, while the bottom band is red. Centered on the green band is a black, inverted triangle that extends to the edges of the flag. Inside the triangle is a gold, five-pointed star with a white border. The aspect ratio of the flag is 2:3.

The color codes for the flag are as follows:

• Green: Pantone 355 C / RGB (0, 100, 60) / CMYK (100, 0, 80, 20)
• Red: Pantone 186 C / RGB (206, 17, 38) / CMYK (0, 100, 100, 5)
• Black: Pantone Black C / RGB (0, 0, 0) / CMYK (0, 0, 0, 100)
• Gold: Pantone 1235 C / RGB (255, 204, 0) / CMYK (0, 15, 100, 0)
• White: Pantone White / RGB (255, 255, 255) / CMYK (0, 0, 0, 0)

The geometric properties and measurements of the flag are as follows:

• Width = 2 units
• Height = 3 units
• Length of the black triangle's base = 1 unit
• Length from the base of the black triangle to the center of the gold star = 1 unit

Some other relevant information about the flag includes:

• The flag was adopted on September 19, 1983, when Saint Kitts and Nevis gained independence from the United Kingdom.
• The green represents the fertile land, the red stands for the struggles of the people, the black triangle symbolizes the African heritage of the people, and the gold star represents hope and liberty.