It's a blackened indigo color with copper microshimmer. In daylight or indoors you can't see much of the shimmer, but in bright sun or artifical light the polish comes to life showing it's hidden shimmer which looks absolutely gorgeous.
It's opaque with 2 coats & a dream to apply as it simply glides on the nails.
In case you'd like to amp up the shimmer, you could perhaps add a coat of CND "Copper Shimmer", but IMO "Copper Shimmer" is too intense & would change the indigo base color too much. Maybe a mix of "Copper Shimmer" & clear polish would do the trick. I think I'll try it out soon!
Thanks for looking :-)