Guerlain Nuit d'Amour is a moderately cool-toned, dark berry with a luminous finish. It is a discontinued lipstick that retails for $37.00 and contains 0.12 oz.
Guerlain Nuit d'Amour (170) Rouge Automatique ($35.00 for 0.12 oz.) is described as a "black red that reveals an intense plum color." It's definitely a shade that will intimidate at glance; it looks burgundy-brown-black with twinkles of ruby shimmer in the tube, but it's so, so different when swatched or worn. The description sounds like they did this deliberately ("reveals"). It's reddish-pink burgundy with hints of plum and ruby micro-shimmer. Even though the shimmer is there, it's so fine and sparse that it's rather subtle. MAC Rebel is redder and brighter. Guerlain Bee looks quite similar on, but it has less red in it (and more opacity). YSL Forbidden Burgundy is a little brighter and redder but still rather similar.
Rouge Automatique hydrating long-lasting lip color: automatically fashionable. Coveted as an It Bag, precious as a gem, glamorous as stilettos! Open and close with just one hand. Its innovative formula combines long-lasting hold with comfort and radiance. Rouge Automatique offers a burst of color, available in a bouquet of 25 shades.