two-tone

adjective2

1. •
   Having two colours or shades.

   • The final outshopping was 55002, which had arrived on October 14 [1980] for a two-month repair, with the usual worksheet taped to its bodyside stating "to be repainted in two-tone green". — 2024
2. •
   Giving two different sounds, either alternately or simultaneously.

   • The drivers' cabs are fitted with the latest equipment, including a loudaphone, electric demisters and two-tone horns; provision is made for the fitting of A.W.S. equipment when available. — 1962