I bought two nail polishes of Catrice (Ultimate Nail Lacquer) a while back. I have a large collection of Catrice nail polishes at home lol. I just love nail polishes of this brand because the colors are lovely, it's inexpensive and it's of good quality.
Catrice has a couple of blue nail polishes in their assortment. 5 to be exact and I have 2 out of the 5. The other one that I have is called #540 Am I Blue or green, click on the name to watch a swatch of the nail polish. The nail polish Up in the air is a bit darker compared to Am I Blue or green, but it's still suitable for the summer. The color of the nail polish Up in the air is slightly different in the pictures than in real.
#450 Sand Francisco
It's not spelled wrong, it's called Sand Francisco xD. It has a sand color, hence the name ;)
These are sold at the Dutch drugstore, Kruidvat. They are €2,49 each which is a great price!
The brushes are black and as you can see in the picture below, the brush from #530 Up in the air is a bit larger than the other one. I liked the larger brush more though, it was easier to apply and it wasn't streaky while I applied it. Two coats were needed to get a good finish. Sand Francisco on the other hand was quite sheer, streaky and I even needed 3 coats to get a "good finish" (it was still streaky after wards).
I like both colors! Which one do you like?
Catrice nail polish swatches