1. NTSC, which is a standard customized by the National Television Standards Committee in 1953. As a standard, it is not suitable for today's monitors, so this can be almost ignored.
2. sRGB, which was developed by Microsoft in 1997 and is currently the most versatile standard.
3. Adobe RGB, obviously, this is a standard developed by Adobe in 1998. It mainly adds CMYK color gamut to sRGB, which improves the coverage of cyan.
