Illamasqua Noble Nail Varnish ($14.00 for 0.50 fl. oz.) is described as a “turquoise blue.” (Sephora has it listed as “robin egg blue.”) It’s a brightened, light-medium blue with a hint of turquoise in it, which gives it that robin’s egg blue hue. It has a cream finish with a naturally glossy shine. Rescue Beauty Lounge’s Faraway is bluer, darker, and has shimmer. SpaRitual Ebb & Flow is more turquoise. Deborah Lippmann On the Beach is bluer, less bright. Zoya Robyn is a smidgen darker, bluer.