ColorMatch RGB
From The Glossary of Digital Photography
A color space that is larger than sRGB, but smaller than Adobe RGB (1998). ColorMatch RGB is designed to match the color and tonal range of an offset press. See also color space

ONLINE GLOSSARY OF DIGITAL PHOTOGRAPY
A color space that is larger than sRGB, but smaller than Adobe RGB (1998). ColorMatch RGB is designed to match the color and tonal range of an offset press. See also color space