I used a base of Seche Natural, 3 coats of Tease and a top coat of Seche Vite. The color is very sheer but as you can see in the sun, you do get the blue flash. The formula on this was great - not runny or thick despite the original layer of dust on my bottle.
If you catch the light properly, you can see all the blue flash. However, if you angle your nails, you get this:
A whole lotta nothing. However, I bet this would look great over black, or really it's a nice understated color - might go well as a french manicure too.
In the shade, you also get that blue flash.