Depending on the fabric, gen, and company producing the multicam, it can be obviously green or obviously tan (tan, gray, yellow and brownish)
ARPAT as well changes shades and dominant colors across manufacturers and fabrics, but it never ceases to be gray.
Blackhawk uses leftover gen1 ARPAT that's ghost white
Tactical Tailor got in the game a little later, so they got the good, darker, foliage green stuff.
And the lvl 5 goretex is the sand/foliage green stuff that works best (for ARPAT)