The present invention relates to a biaxially oriented polyester film, which a) has a base layer B, which includes a yellow dye and a red dye, b) has, on each side of the base layer B, at least one layer (A or C) which includes, based on the weight of layer A or C, less than 0.01% by weight of the yellow dye and less than 0.01% by weight of the red dye, and c) the film has one absorption maximum lying at from 400 to 500 nm in the UV/visible spectrum from 400 to 800 nm. Preferred dyes are anthraquinone dyes and perinone dyes; the polyester is preferably PET. After metallization or lamination, the film has a gold appearance, and is a suitable packaging material.