But if you do the same thing in a wide-gamut monitor configured to show its full gamut, that “0,255,0” RGB value will show native gamut green 255 and it will look over-saturated.
With a common monitor (sRGB monitor) you can output its contents to the monitor directly, without conversions or color management, and you will see the green color that is “fairly close” to color information stored in that JPEG file. For example, you have an sRGB 300×300 JPEG image that is just a green background (RGB values “0,255,0” in sRGB). The first thing photographers need to know is that their wide-gamut monitors are meant to be used in color-managed applications: applications that work in a color managed environment. 2) Color Management and Color Coordinates That’s the main reason that leads professionals and photo hobbyists into seeking monitors with a wider gamut which covers a large percentage of color spaces like AdobeRGB 1998 or eciRGBv2. This color space is not able to cover colors printable with current technology like offset printing or a domestic inkjet printer – there are colors like cyan-turquoise green that are printable with such devices, but cannot be shown on an sRGB monitor. For historical reasons, sRGB and other similar color spaces like Rec.709 cover the same gamut (subset of visible colors) as CRT monitors. The Internet and most computer content is meant for this particular color space. Common monitors try to cover a minimum standard color space known as “ sRGB” with their red, green and blue emitted light. As you might already know, monitors, TVs, mobile devices, etc., can show us colors using a mixture or Red, Green and Blue (RGB) light.
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