United in Purpose is a 12 piece collection and I purchased 9 - the shades I passed on were Angel's Breath, Pearls of Wisdom and Dare to be Bare.
|L-R: Always A Lady; Hopeful; Faith; Exquisite|
|L-R: Hello Gorgeous!; United; Heart of the Matter; Live, Love, Laugh; Beauty Within|
First up is the lighter colours. All of these are 2 coats, with 1 coat top coat (Essie Good to Go).
Exquisite (index finger): A mid-tone pink with silver shimmer.
Faith (middle finger): a sheer, milky pale pink. creme The sheerest of them all, you can still see obvious nail.
Hopeful (ring finger): an opaque white-pink creme.
Always a Lady (pinkie finger): opaque, 'warmer' pink. Full swatches here.
|L-R: Exquisite, Faith, Hopeful, Always a Lady - direct sunlight|
As I mentioned above, I didn't have a whole lot of time to get these swatches done. However, I had a quick look through my nail polish stash (it's a little unorganised at the moment so I did what I could) and tried to find similar colours. Please note that these aren't intended to be "dupes"because I could only do bottle comparisons, not nail comparisons. But I did this to hopefully give you an idea of similar shades.
I was almost certain Pink-ing of You by OPI would be a dupe for always a lady, but alas, it was nothing like it.
Edit: Just a head's up, I recently picked up OPI's Princesses Rule! in a mini set and it looked quite similar in the bottle to Exquisite.
|Comparison: Exquisite / OPI Pink-ing of You / Always a Lady|
Next up is Faith. Just a note - whilst these Essie colours are quite similar in the bottle, please note that Faith is the sheerest of my swatches, whilst some of these Essie shades come out quite opaque.
|L-R: Essie Miss Matched / Essie Fiji / Faith / Essie Ballet Slippers|
|L-R: Essie Spaghetti Strap / Always a Lady / Essie Like to Be Bad|
|L-R: Essie Guchi Muchi Puchi / Hopeful / Essie Better Together / Essie Mademoiselle|
Next up is the glitters and brights.
Hello Gorgeous (thumb): light pink glitter with strong holographic glitter
Heart of the Matter (index finger): deeper, reddened pink
Live, Love, Laugh (middle finger): coral pink - very strong orange tones
Beauty Within (ring finger): bright pink - not quite neon but very bright none-the-less
United (pinkie finger): pink glitter - slightly darker, slightly less holographic then Hello Gorgeous
Beauty Within is probably the most easily "dupable" or at least comparable of the brights. I found that in the bottle, Essie's Lights came very close. I haven't worn Lights though, so I can't say how close they are on the nail.
|Orly Beach Cruise-r / Beauty Within / Essie Lights|
I compared Live, Love, Laugh twice.
|China Glaze Wicked Style / Live, Love, Laugh|
|Revlon Raspberry Rapture / Live, Love, Laugh / Essie Watermelon|
My picks from the collection are Live, Love, Laugh, Hello Gorgeous and Exquisite.
Once again I apologise for the condition of my nails! (this has become a bit of a recurring problem, oops!)