Flag of Brunei
| Use | Civil and state flag, civil ensign |
|---|---|
| Proportion | 1:2 |
| Adopted | 29 September 1959 |
| Design | A centered red crest of Brunei on a yellow field cut by black and white diagonal stripes (parallelograms). |
| Designed by | Pengiran Muhammad Yusuf |
The flag of Brunei was originally a solid yellow background until 1906 when it added two diagonal white and black striped lines to the flags. By then, Brunei was already a British protectorate since 1888. The modern flag (including the red emblem) was adopted in 1959 along with their new constitusion.