the Green Died
In the late 20th century, the main TV in my apartment was a 25-inch NEC. It worked fine until the green went away. The cause was probably a burnout of one of the three electron guns in the picture tube. The set could no longer display all the colors in the triangle, but only those on the R-B edge.
I promptly bought a new Sony to serve as my main TV and exiled the NEC to my bedroom. A few years later, its blue gun also failed and I banished it to the trash heap. But until then, I occasionally found myself in the bedroom watching it.
The moral: Our vision forgives color irregularities by adapting to what it sees.
My present high-def LG television has overall picture modes called Standard, Eco, Cinema, Game, Expert1, Expert2, and Vivid. I can also select from color gamuts labeled Standard, EBU, SMPTE, BT709, and Wide. I can tell the difference, but I could watch almost any of these modes.
Then I can make further adjustments for backlight, contrast, brightness, horizontal sharpness, vertical sharpness, color, tint, red, green, and blue. In the color management system I can adjust the saturation, tint, and luminance of red, green, blue, cyan, magenta, and yellow. I can even look at only red, only green, or only blue. And I have other choices. I dont even know what some of these are.
When a live TV program originates, for each camera the video operator has controls to adjust parameters like these and more. His task is to precisely match all the cameras, so that when the director cuts from Camera 1 to Camera 2 the picture does not suddenly become slightly redder.
But when Im watching a TV program at home, I dont have to match my picture to any other picture. Should the brightness be set to 70 or to 71? I dont care. I dont bother with fine adjustments. Almost any setting looks okay to me, as long as theres at least some green in it.