I have used them more for highlights - under the brow bone and across the cheek bone. A little shimmer - really pretty!
I cannot find the names of the colours listed anywhere. The colours are a light taupe colour, a purplish brown with some sparkle, and orange-y colour, and a golden colour.
The two colours on the bottom have a shimmer to them and could be used for highlighting brow/cheek bones.
They don't have any special names on the packaging (I own one and double checked for you). If you look at the ingredients on the page for the palette it is the same thing on the back of the outer box that it comes in. The shade names that they give there are: pink gold, gold, brown, and pale pink. So they don't give a lot of info.
Looking at it right in front of me I would say- top left brown w/gold glitter, top right pink with iridescent gold, bottom left lime green with yellow shimmer, bottom right copper shimmer, lower case left peach shimmer and right light orange shimmer. The picture on Sephora does not do it justice. I am attaching a pic that might help out some. Loves!
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I use the two bottom-tier shadows to adjust some of the shimmer from the top-tier or simply as a neutral color for my upper lid (I am very fair-skinned). So, it could be used as a bit of both.