China Glaze Keep Calm, Paint On is a moderately warm-toned, light aqua with a pearl finish. It is a limited edition nail lacquer that retails for $7.50 and contains 0.5 oz.
China Glaze Keep Calm, Paint On Nail Lacquer ($8.00 for 0.50 fl. oz.) is described as a "sea foam green." It's a pale, sea foam green (or aqua green, if you prefer) with very fine white micro-shimmer. Butter London Fiver is the closest shade I have to this, but Fiver is a cream finish (no shimmer) and a touch lighter. MAC In the Limelight is bluer, darker, and a cream.