The flag of Gibraltar has an aspect ratio of 1:2. It consists of two horizontal stripes with the following color codes:

1. Upper stripe (2/3 of the flag's height): white, HEX #FFFFFF
2. Lower stripe (1/3 of the flag's height): red, HEX #CE1126

On the upper left corner of the flag, there's a three-towered red castle with the following dimensions:

• Castle width: 2/5 of the flag's width
• Castle height: 1/3 of the flag's height

A gold key hangs from the center tower of the castle and extends into the red stripe. The key has the following color code:

• Gold: HEX #D0AE3D