Which Oceanian country's flag has a yellow Y-shaped band?

Vanuatu's flag has a yellow Y-shaped band. The shape, formally called a pall, runs from the hoist and divides the red and green sections of the flag.

The Y represents the shape of the Vanuatu island chain as it appears on a map. It also symbolizes the light of the Gospel passing through the islands. The design was adopted when Vanuatu became independent in 1980, and its colors were based on those of the Vanua'aku Pati, the movement that helped lead the country to independence.

Vanuatu's flag combines red, green, black, and yellow. Red represents blood and shared humanity, green stands for the islands' natural richness, and black represents the Melanesian ni-Vanuatu people. The yellow edging helps the pall stand out against the black triangle.

The emblem inside the black section adds another layer of meaning: a boar's tusk represents custom and prosperity, while two namele fronds symbolize peace. Their 39 leaflets recall the original 39 members of Vanuatu's parliament.