China Glaze Let's Groove (artificial light)
Let's Groove is also from the Retro Diva collection. As you can see, it is a beautiful deep purple shimmer. There is no question that this is a purple; it doesn't look black in other lights. It was opaque in 2 coats (as shown here). It was only slightly thick, but I overall had no application issues. Overall, if you are a purple fan, you will definitely love this polish. I don't know if it really screams 70s or retro, but it is really beautiful.