Why does the color in an older bottle look different than my new BLUESKY bottle of the same color shade?

A new gel polish bottle may appear different from your old one, if your old one has been opened for more than a year or has not been opened but stored for more than two years. In this case, the gel polish color starts to fade or different layers of pigmentation form inside the bottle, or yellow signs appear. These bottles have expired and should be discarded. Specifically, neon, temperature changing colors, and any colors which contain big glitters cannot be stored for more than a year. Higher quality standards, pure color pigments, and new advanced ingredients have offered us the ability to produce an improved formula with an increased product consistency over the product’s lifetime. As a reminder, we recommend that the best useful life of the bottle is 12 months. Once the bottle is opened, we recommend that the best useful life is 6 months.