I really love nail polishes and particularly the ones from KIKO. They are cheap and you can get nearly every colour. The texture is really good and it's really simple to apply them. If you look at the packaging they are really similar to the Essie ones and I also think that you can use them as dupes. All of the KIKO nail polishes cost 2.50 € and less.
359 Light Peach
360 Strawberry Pink
389 Mint Milk
297 Acid Green
As you can see they're all really bright and I just love them.
If you're interested in the KIKO nail polishes, you can find them HERE