sRGB is a standardised RGB colour space that was developed to provide a consistent way of representing colours across different devices such as monitors, printers, and cameras. It defines specific ranges of red, green, and blue values that together create a standard gamut of colours that can be reliably displayed and reproduced. sRGB was proposed as a Web standard to ensure that images viewed on different computers and devices appear as consistently as possible.
Because sRGB is widely supported by most digital cameras, monitors, and web browsers, it has become the default colour space for online images and many consumer-level devices. While it does not cover as wide a gamut as some professional colour spaces like Adobe RGB or ProPhoto RGB, sRGB remains highly practical for general photography, web publishing, and any scenario where consistency across multiple platforms is important. Using sRGB helps photographers and designers minimise unexpected colour shifts when images are shared or displayed digitally.