Sally Hansen in Blazing Blue, $5; at Target
Night sky blue with tiny silver flecks.
YSL in Tuxedo Grey, $20; yslbeautyus.com
Chic and classic, like a YSL smoking jacket for your nails.
Lippmann Collection in Don't Tell Mama, $16; at Neiman Marcus
Like a mood ring, this chameleon shade is black, turquoise, and teal all at once.Read MoreLess