Halley's Comet was just begging to be teamed up with black.  Being that this color reminds me so much of a mermaid's tail, I decided a fishtail mani would be appropriate.

I personally see the top of a heart when I look at this design, but what do I know. ;)

I added China Glaze Liquid Leather to the tip of each nail, then to accent my index and middle fingers, added another fishtail of Halley's Comet.

I love how different Halley's Comet looks over black.  The green is much stronger when it's layered over black.  So pretty!  I actually wore this for several day, I loved it so much.