A group led by Halas and Link at Rice University have demonstrated aluminum-based, color pixels for display application. Their method combines two effects to achieve spectral narrowing and brilliance: tuning the plasmonic response of individual nanorods through control of rod length, and spectral narrowing through control of rod spacing. While they prepared the experimental specimens by electron beam lithography and metal lift-off, it seems clear from the dimensions that metal stamping (à la NIL Technology) or J-FIL (à la Molecular Imprints) would be suitable for commercial realization.
Reference: Olson, et al., “Vivid, full-color aluminum plasmonic pixels”, PNAS 111(40)14348.