Zoya Blu Nail Lacquer ($8.00 for 0.50 fl. oz.) is described as a "lucky hyacinth blue cream." It's a pale sky blue with a cream finish. There's a real softness to the color, and there's also an almost indigo-tint that makes it less overtly blue. NARS Kutki is bluer, slightly...

Zoya Piaf Nail Lacquer ($8.00 for 0.50 fl. oz.) is described as a "fresh forsythia yellow metallic." It's a subdued, sunshine yellow with pale gold shimmer and sparkle. China Glaze Champagne Bubbles was the closest color I could think of, but it's darker, yellower--more gold...