Grevillea polychroma , commonly known as Tullach Ard grevillea, is a species of the plant genus Grevillea. It is endemic to the state of Victoria in Australia. The taxon was first formally described as a subspecies of Grevillea brevifolia in 2000. It was promoted to species status in 2005. The species is listed as "Rare in Victoria" on the Department of Sustainability and Environment's Advisory List of Rare Or Threatened Plants In Victoria.