Twinkle is a shimmery sapphire blue.
Crystal Eyes is a lovely blue creme that is perfect for spring.
Illume is a royal purple creme bordering on a jelly. It's bright but not neon. This was so hard to photograph. It's more red based in real life. The first picture gives you a slightly more accurate color. Also, it is an exact match to Orly Charged Up - the formula is even the same. So if you have that one, you don't need this one.
If you look at the edge of the nail you can see the accurate color.
This is a comparison of Orly Charged Up and Illume. Charged Up is on the left (thumb) and Illume is on the right.