When shopping for nail polishes, I like to first look up swatches online. It can help give me a better idea of what a certain polish looks like on, since many appear different in the bottle than on your nails.  I did this when trying to decide which Zoya polishes to get. I decide on these six:

Maya
 swatch from Polish Addict
Yummy
swatch from Polish or Perish
Zanna

swatch from shaglam
Edyta


Tiffany
swatch from Imperfectly Painted
Crystal
swatch from The Polishaholic

Nail blogs make it easy to find swatches of just about any polish.  Google is your friend!  Happy shopping!