Its a German colour standard used throughout Europe mostly for paint coatings.
The RAL color non-profit that administers the standard sells colour swatches.
Some independant swatch makers such as
www.ralcolorchart.com have near match RGB and HEX, CYMK numbers attached.
But most are slightly different...I suppose its how its measured...illumination source colour, calibration of colorimeter, and which colour space is used.