"Color television is a television transmission technology that includes frame color information, so the video image can be displayed in color on television sets. It is an improvement in earlier television technology, monochrome or black and white television,
where the image was displayed in greyscale.

Television broadcasting stations and networks in much of the world were upgraded from black and white to color broadcasting between 1975 and 1979. The invention of color television standards is an important part of television history.
In its most basic form, a color emission can be created by diffusing three black and white images, one in each of the three primary colors in light: red, green, and blue (RGB). When they appear together or in quick succession, these images combine to produce a full-color image as seen by the viewer.
One of the great technical challenges of introducing color in television transmission was the desire to conserve bandwidth, potentially three times greater than that existing in black and white standards, and not to use an excessive amount of radio spectrum. .

In the U.S,
after considerable investigative work, the National Television System Committee (NTSC) 1 approved an electronic system developed by the Radio Corporation of America (RCA), which encodes color information separately from brightness information,
and greatly reduces color resolution in order to save bandwidth. The image brightness was still compatible with existing black and white television sets by slightly reducing the resolution,
while color televisions could decode the additional information in the signal and produce a limited screen color resolution. The highest black-and-white resolution and the lowest color image combine to produce an apparent high-resolution color image.
The NTSC standard represented a great technical achievement."