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Color television is a television transmission technology that includes information on the color of the picture, so the video image can be displayed in color on the television set. It is considered an improvement on the earliest television technology, monochrome or black-and-white television, in which the image is displayed in shades of gray (grayscale). Television broadcasting stations and networks in most parts of the world upgraded from black-and-white to color transmission between the 1960s and the 1980s. The invention of color television standards is an important part of the history of television, and it is described in the technology of television article.