The same color as their human, orc, dwarf, and ogre neighbors. Pale in the north, shading to near black along the equator. They never evolved anything analogous to the red and yellow pigment of humans, so they're usually some shade of brown.
The colors they prefer in clothing depends on their mood, the situation, and what's just been washed.
BTW, lavender doesn't mean a dang thing where elves are concerned. There's a particular shade of aquamarine that means something, but only among fans of the recent remake of The Moon Pool (A. Merrit), and it's not limited to elves.