sRGB is used for encoding pretty much all JPEGs and other format bitmaps too. (Although some are in higher gamut colour spaces like AdobeRGB or DCI-P3, as many

sRGB is used for encoding pretty much all JPEGs and other format bitmaps too. (Although some are in higher gamut colour spaces like AdobeRGB or DCI-P3, as many displays support this wider range of colours too.) If you want to be efficient with your encoding, you'll always use a gamma-like function. This is because our eyes have a logarithmic response to brightness, and the gamma is essentially an inverse of that.