UV paints, made with photochromic pigments, react to sunlight. When exposed to UV rays, the colors change, and in the shade, the paint becomes translucent again.
This magical effect allows you to have designs that change under the sun, such as sneakers with two looks in one!
However, these pigments have a limited lifespan, so avoid prolonged sun exposure. Ideally, store your custom creations in the dark to preserve the effect.