The flag of Sarawak, officially known as Ibu Pertiwi, is the official flag of Sarawak, a state in Malaysia. It is based on the flag of the Raj of Sarawak of the White Rajah, and includes the yellow of Southeast Asian royalty — a similar yellow and diagonal black are in the flag of Brunei, although Brunei's yellow is of a brighter shade.

The flag of Brunei has a centered emblem of Brunei on a yellow field cut by black and white diagonal stripes. The yellow field represents the sultan of Brunei. The red crest consists of a crescent facing upwards, joined with a parasol, with hands on the sides.