Here's DL I Know What Boys Like:
This shade is a deep dusty blue that leans purple, or a deep dusty blue that leans purple depending on your preference. It's a beautiful alternative to wearing a straight blue or purple and its hard to find another shade that I could comfortably call a dupe. But, of course, the thrill of the hunt is half the fun so here are some of the comparisons I found in my stash:
|Index to Pinkie : I Know What Boys Like, NYX Girls True Navy, Finger Paints Grape Gumball, Zoya Caitlin|
|Index/Ring: DL I Know What Boys Like, Middle: OPI Dating A Royal, Pinkie: Sinful Colors Zeus|
There are similarities to a few of the polishes -- namely NYX Girls True Navy and Finger Paints Grape Gumball. OPI Dating A Royal looks close in the photo but is more navy blue than the dusty deep blurple IKWBL is. Grape Gumball is like a shimmery version of it and Caitlin is a lighter, greyed out shade of it.
True Navy comes the closest to being a dupe, with my husband being unable to tell the difference between the two in low lighting. They're similar formula-wise with DL being slightly better two apply but both took 3 coats for full coverage.
All in all, this is a gorgeous color. I don't regret buying it; especially on special. HSN shipped fairly quickly and I received it within a few days of ordering it. But, like I said, it is a pricier polish ($16) so if you're looking for a less expensive alternative, NYX Girls True Navy would probably do the trick at around $2 - $2.50 a bottle on Ebay, or I got mine in a Pink Zone store in one of my local shopping malls.