Working with such profile can be useful to improve print results, but is dangerous if not used with a properly profiled and/or calibrated good display. Some other profiles like Adobe RGB are optimized to fit more printable colors in this limited range, primarily extending cyan-green hues. So sRGB profile is optimized to fit all colors that most common screen can reproduce in those 256 values per R/G/B channels. This is why was created the sRGB profile to fit more different colors in this limited amount of values, in a perceptually regular grading, by applying a custom gamma curve (see picture here: ) to emulate the standard response curve of old CRT screens. If we use a linear profile as described above to define those color values, we will miss some important visible color change steps and have a big number of values looking the same (leading to posterization effect). With 8bit/channel bit depth, we have only 256 values to store this whole line. If you divide it choosing steps at a regular interval, you get what is called a linear profile, with a gamma=1 curve represented as a straight line from 0 to 1.
Imagine a line with the whole color spectrum from pure black (0,0,0) to pure blue (0,0,1) in a pure XYZ color cube. This “color set” can be used to define different things:Ĭhoosing the right workspace profile to use depends on how much colors you need and on the bit depth you plan to use. So to make it simple, a color profile is just a file defining a set of colors inside a pure XYZ color cube.
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