Cobalt Blue Nails
Updated 2025.09.10. This post contains affiliate links. If you buy something through these links, I may earn a commission at no extra cost to you. Some products were sent as samples, but all opinions are my own. As an Amazon Associate I earn from qualifying purchases.
Cobalt is a chemical element (Co) with an atomic number of 27. As a free element, it's naturally a hard, lustrous silver metal.
The pigment cobalt blue was identified in 1802 by the French chemist Louis Jaques Thénard.
While experimenting with cobalt, he discovered mixing cobalt oxide with aluminum oxide created a highly-stable rich blue pigment.
Cobalt blues are gorgeous, vibrant colors.
On the nails, cobalt blue is a fantastic summer color. It’s reminiscent of deep, clear ocean waters and makes a stunning compliment to any look.
Below are swatches of four of the best cobalt blue nail polishes we’ve found so far, all in 2 coats.
Gifted by Beyond Polish
essie push play
It’s the namesake of the 2023 push play summer collection and a creamy cobalt blue that’s very easy to apply.
China Glaze giveaway prize
China Glaze Crushin’ on Blue
Shown in 2 coats and in China Glazes NEW formula launched Spring 2025, This bright, sapphire blue is packed with pigment and Hexanal, a keratin strengthener.
It has a chip-resistant finish for a longer weartime and a new wide, round brush, which might be the best part - it gives you a smoother application in fewer strokes.
essie butler please
Shown in two coats, butler please is a bright blue with a cream finish. It’s a cheerful blue that’s one of my favorites for summer and 4th of July nails.
What do you think of cobalt blue nail polish? Do you have any cobalt blue polishes in your collection?
For best results with these polishes, pair them with a base and top coat.
Add these colors to your collection using the links above!
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