Waterworld, from the Wonderful Worlds collection by Chamaeleon Nails is a UV reactive nail polish.

This shade is a baby blue crelly base that turns a dark blurple when in the sun (UV) filled with golden/aqua shifting iridescent flakes, that come to life when exposed to sunlight.

Three normal (thicker) coats are recommended. With two coats, it's possible that you can still see the nail line showing through - especially on long nails, and if you apply thin coats. A blurring base coat can help if a VNL bothers you.

Applying a base coat is generally recommended, as this increases the durability of your polish, especially if you have brittle nails.

⚠️ A Top Coat can affect the intensity of the color transition in the sun, so only applying a very thin layer is recommend.

General advice regarding UV reactive polishes:

• Avoid top coats that contain UV inhibitors, as they can weaken the transition in natural sunlight. Some of the most common UV inhibitors are: Benzophenone, Etocrylene, Octocrylene.
• UV reactive polishes transition the best in direct sunlight at noon. In the evenings/mornings, dusky sky, etc., the transition can be less strong. -> Generally speaking: the stronger the sunlight (UV rays), the stronger the transition will be.
• You will get a less intense (or no at all) transition when holding your polish into the sun behind a window.
•These UV reactive polishes are designed to be worn in three coats, as a thicker formulation can result in streakiness and poor self-leveling properties due to the nature of the solar pigment. If a visible nail line bothers you, I recommend applying a blurring base coat.
•If your polish shows a weak transition, make sure your bottle is cool (room temperature) or let it cool down and try again. When the polish is too warm, the transition can be weaker.
•Extreme temperatures or the exposure to daylight over a longer period of time can damage the pigment and it is possible that as a result the polish has a less strong transition, or that it stops transitioning at all. -> So make sure you store them cool and dark.
•The color changing effect won’t last forever – so in order to preserve this effect as long as possible, store your UV reactive polishes in a dark and cool place. But most importantly, wear it often! General shelf life is said to be 6-12 months.
•If a UV reactive polish has stopped transitioning, it still can be used like any other polish.