Duotones are traditionally created through a halftone printing process where one halftone is printed on top of another of a contrasting color, creating a two-toned image. This fundamental printing technique has found new life in digital media. Imaging software has made it easier than ever to create duotones, as well as related variations like monotones, tritones, quadtones and “fake duotones” (tinted images).
Spotify has been credited with their return to mainstream design by using duotone images in their app and promotional microsites. Designers are taking advantage of this technique as imagery created within a limited color palette is delightfully complimentary to semi-flat design.
With bold colors and beautiful application possibilities, duotones are predicted to be one of the hottest trends of 2018.