Steel is a charcoal grey shimmer. The polish in the bottle I got was rather thick, not the easy to apply goodness I've come to expect from Chanel. I used two coats, though I might have been able to stop at one if I'd been more careful applying it.
I was decidedly underwhelmed by Steel indoors, so took it out in the sun to see if it would look better in bright light. It didn't, not really. The shimmer did show up better, and I caught some sparks of blue I hadn't seen inside, but it still did not enchant me.
Looking through my blacks, whites, and greys drawer, I found a couple much cheaper polishes to compare to Steel.
The Massini and the Ulta are less subtle shimmers than the Chanel, so they're not dupes, but the look is similar enough for me.
Strong is a deep brownish plum shimmer. Really deep, like almost black.
Unfortunately, I didn't get any good shots of Strong in the sun. Like Steel, its shimmer was more visible in the brighter light, but it wasn't anything dramatic.
Of course I did a comparison.
No dupes here, either; the Chanel is my least favorite of the three.
I'm thinking these Chanels might be headed for my swap box (or that blog sale I keep thinking I'll get around to having one of these months). They're just not that special to my eyes.