Cakes & Rainbows (both of which I'm an inherent fan of), has a soft gold base with a holographic effect. I say it's a gold with holo instead of just a gold holo because that's how it seemed to me. Much more subtle and shimmer-like indoors, but a nice linear effect in bright sunlight. This was thin and I had to take care not to overload my brush, but other than that it went on without a fuss. This took three coats for full opacity.
Farting Rainbows has a cornflower blue base with a violet shift and a holographic effect. This one is more obviously holo indoors, but still on the subtle side in my humble opinion. Out in the sunshine it just sings though, very pretty. This was not as thin as Cakes & Rainbows but I still used three coats.
Snow Unicorn has a frosty pearl base with a holographic effect. I expected this to be a straight silver holo by seeing it in the bottle, but when I applied it I gasped as it turned frosty before my eyes! I'm not against all frosts, but this just wasn't my cup of tea. The brushstrokes killed it for me. This is also quite thin and took three coats for opacity.
Rainbows & Unicorns Unite has a lilac pearl purple base with a blue shift and a holographic effect. Another three coater, but easy formula, not too thin. This is very pretty but I think I would prefer it without the frostiness.
Unicorn Fields is a rich clover green linear holographic. I really love this one, strongest holo fire and best formula. Full opacity at two coats. This may be not as unique as the other shades in the collection, but I just swoon over a green holo!
This collection is available now on the Color4Nails website for $10 per bottle. Let me know what you think of Unicorns and Rainbows! Even though it's not my favorite collection overall, I really enjoyed Unicorn Fields and Farting Rainbows. I'll see you back again soon :)
The products mentioned were provided for an honest review.