OPI Black Onyx
I realize that today I'm making a polish on a color that is not complex or unique, but I assure you there is valid reason behind it. Black is a very useful polish color- it is often used as the base coat for sheer colors, duochromes, or glitters, and can make a great canvas for nail art. In short, black is a color you will use more often that you realize.
Yes, black is the one color in my collection that I have actually used an entire bottle of and had to replace! Since I needed to replace it anyways, I thought I'd treat myself to a higher end black, picking up OPI Black Onyx. I've used quite a few brands of black in the past. In fact, Sinful Color's Black on Black was my go to black for quite sometime- it was opaque in one thick-ish coat and was rather affordable at $1.99 a bottle. I've also used Wet'n'Wild's Black Creme, while it was a decent polish, the brush was unforgivable.
Speaking of brushes, this is the exact reason I was willing to try OPI Black Onyx even though Black on Black was just fine. I love the OPI brush- it seems to work really well with the shape and size of my nail beds. I'm such a stickler for good brushes, especially on dark colors, because I am not a fan of clean up. I can, and do, clean up polish that ends up on my cuticle or area around the nail, but I think it's much faster to complete my manicure when I don't have to do it.
So here it is, 2 coats of OPI Black Onyx. I would recommend this polish, but again, mainly because of the brush. If brushes aren't a priority for you, Sinful Color's Black on Black is just as good.