“Relative Colorimetric” is one of four rendering intents in gamut mapping.
The white point of the original colour space is adjusted to that of the destination colour space, and all other colours are also shifted in relation to it. Colours that lie outside the destination colour space are moved to its edge (clipping).
This method is particularly suitable for achieving the most accurate colour reproduction possible when converting from CMYK to CMYK, or even from less saturated RGB images to CMYK, as long as the colour spaces are of similar size.