Unless I am grossly mistaken, Annatto here in Mexico is called achiote, and it is used in the cochinita pibil dish.
It has a distinctive taste, and it dyes things a very beautiful red/orange - very effective splotched on a white shirt.
As a fashion project, you might buy a plain blue silk tie and paint regimental red strips with achiote on it. In an extremity, you could always sacrifice your tie and make cochinita pibil.