The OCC website describes Hush as "Antique ballerina pink", I would say it's a pale nude pink in the same colour family as MAC's Hue and Myth.
Level of opacity can be built up depending on your preference, I prefer a more sheered out, topped with gloss look but if you're a fan of the opaque pale lipped look, this will answer your prayers.

Although it may look like it's meant to be applied directly from the tube, DO NOT DO SO! as lazy as I am, I had to resort to using a lipbrush (I didn't know I had one but yeah I found one in my stash and it was Dior @.@ Sweet!). The Lip Tar applies glossy, and dries down to a matte-ish, satin finish which some might find a bit drying. The formula feels light and "clings" to lips really well, a bit too well actually, especially to all my lip lines T.T - wear lipbalm underneath! Words of warning: less is more. You only need a tiny bit to cover your lips, anything more and it tends to go everywhere. I would think a lip pencil would definitely help as it's a tad tricky to apply.
The only thing I dislike about this is its peppermint smell/flavour. It makes me think that there's toothpaste on my lips that I haven't wiped off yet, ugh I hate peppermint, it's second only to my hatred of anything Patchouli.
As to its longevity, as long as I let it dry properly before applying my gloss, it'll stay from the time I apply it in the morning to midday, so I'd say average about 4 hours of wear.
If you're lazy like me, and not likely to mix your own colours, in addition to Hush, Pageant (Fuchsia), Grandma (gorgeous gorgeous coral, why did I not get it?!), NSFW (OMFG red), Anime (Neon pink), and their coming soon colour Memento (Beige pink) are colours that can be worn alone.