un vestido azul

a blue dress

→ uno
phrase Rare #35,392
a blue dress The adjective azul does not change form for masculine or feminine nouns, but vestido is masculine, so it takes the article un.
SP: Compré un vestido azul para la fiesta.
EN: I bought a blue dress for the party.

Vestía un vestido azul con perlas.

She was wearing a blue dress with pearls.

— La diva (1981)

Ella eligió un vestido azul del armario.

She chose a blue dress from the wardrobe.

Mi mujer lleva un vestido azul.

My wife is wearing a blue dress.

Era un vestido azul, y sin chaqueta.

It was a blue dress, and without a jacket.

— Decision to Leave (2022)

Ella eligió un vestido azul claro.

She chose a light blue dress.

Lleva puesto un vestido azul claro.

She is wearing a light blue dress.

Mi esposa lleva un vestido azul.

My wife is wearing a blue dress.