Here is my swatch of Yuna, from Zoya's Ignite line. Yuna is a solid steel grey color. The shimmer flashes a yellow/gold in the sunlight which is the most interesting and contrasting combo (in my opinion) in this set. Two coats. No topcoat.
This is my swatch of Autumn from the Zoya Ignite line. The color is the most metallic of all the Ignite line. It has a strong rusty metal color and flashes copper in sun. Beautiful color. Definitely lives up to its name. I feel like digging all my sweaters out of the cedar closet and it's only August and still nearly 100 degrees outside! Two coats, no topcoat.
Teigen is a part of Zoya's Iginte line. It is a dark pink/fuchsia, with a golden shimmer similar to Tinsley. My recommendation for Teigen is to slowly, and carefully apply 1 coat. It will be a little sheer, but I just preferred the coloring that way, as it gave a much brighter pink appearance that way. Two coats leave it a little too similar to India. More on that here. Swatches shown with two coats. One coat example shown in linked blog. I may do a full hand reswatch with one coat later today.