The triangle at the hoist of the Philippines' national flag is white.
The flag is a horizontal bicolor of royal blue and crimson red, with a white equilateral triangle based at the hoist, the side nearest the flagpole. Its three corners contain golden-yellow five-pointed stars, while an eight-rayed golden sun sits near the triangle's center.
The white triangle is officially associated with liberty, equality, and fraternity. Historically, the 1898 proclamation of Philippine independence linked the triangle to the Katipunan, the revolutionary society that helped lead the struggle against Spanish rule. The flag was designed by Emilio Aguinaldo and first formally unfurled at the independence proclamation on June 12, 1898.
A common mix-up is confusing the white triangle with the yellow sun or stars inside it. Another distinctive detail is that the flag can be turned upside down: with the red field above the blue, it indicates that the country is at war.