The flag of Brunei has a yellow field with two diagonal black stripes running from the top left to the bottom right corner, and a white emblem in the center. The emblem consists of a parasol (payung) flanked by two upturned hands (bendera). The color codes for the flag are:

• Yellow: Pantone 116C; RGB 255, 204, 0; CMYK 0, 20, 100, 0
• Black: Pantone Black C; RGB 0, 0, 0; CMYK 0, 0, 0, 100
• White: Pantone White; RGB 255, 255, 255; CMYK 0, 0, 0, 0

The aspect ratio of the flag is 1:2, which means that the width of the flag is half its length. The diagonal stripes are at a 45-degree angle and have a width of approximately one-fifth of the width of the flag. The parasol and hands in the emblem are in black and have a height of two-thirds the height of the yellow field.

Overall, the flag of Brunei has a simple and distinctive design with strong geometric properties.