Top-down fabrication of plasmonic materials with designed optical response in the visible spectral range by conventional lithographic methods has remained challenging due to limited spatial resolution, the complexity of scaling, and the difficulty to generate three-dimensional architectures. Bottom-up molecular self-assembly provides an alternative route to create nanomaterials which is not restricted by the above limitations. Here, we demonstrate how the DNA origami method can be used to produce plasmonic materials with tailored optical response at visible wavelengths.