400 is a Grey holographic polish, I was very impressed with the application of this polishes. Coverage was opaque in 2 coats and top coat did not dull the holo.
Here is 1 coat of the Knight, 2 of 400 and one of the Shield.
*edit* I can't believe I forgot to put on purchase information, thank you to Sue for commenting to remind me, Kiko polishes can be purchased from the stores, I was at the one in London Westfield Centre. If you go to their website here, you can check if there is a store near you, or I think you can also order online.
Thanks for looking <3