Here are some pictures off the "Grege" Interior off a prefacelift model I grabbed quickly of the net. Note the upper half of this interior is the same colour as the dark grey trimed vehicle (Upper door trims and the dash panel etc...) and the lower half (seats, lower door trims) are in the "Grege".
The interior trim colours haven't changed with the facelift, just the names of the colours. It used to be called "Sandstone" on the prefacelift. The only difference in the interior colours of the facelift Presara is the wood grain has changed from the high gloss marbled finish to a satin finish linear pattern like the woodgrain in the Kluger Grande.
The name "Grege" was a genius idea from Toyota's marketing department that merges the words Grey & Beige as the colour is supposedly half way between the two.
IMO the Grege interior looks classy and really makes the cabin look light, airy and larger but can be a bugger to keep clean and shows up wear & tear more. The Dark Grey interior looks sportier, is easier to keep clean and hides wear more, but is a little more claustrophobic.