NARS Night Bird is a slightly cool-toned, very dark purple with a sparkle finish. It is a permanent eyeliner that retails for $24.00 and contains 0.02 oz.
NARS Night Bird Night Series Eyeliner ($24.00 for 0.02 oz.) is described as a "black with purple pearl." It's a medium-dark black base with violet and plum shimmer. It was sheer and more of a faded, warm-toned black with a couple of bits of purple shimmer here and there in one stroke. When I tried to layer it, I was able to semi-opaque color, but it didn't layer evenly, so it doesn't give a really rich, solid line of color. Urban Decay Delinquent (P, $19.00) is very similar. MAC Permaplum (P, $16.00) is less shimmery. MAC Designer Purple (P, $15.00) is lighter. NARS Tatar (P, $25.00) is darker. See comparison swatches / view dupes.