Definitely an Acropora, not sure what species it is. I reccomrec placing it in a high light area with higher flow. Mini colonies can be tricky as they are usually maricultured and can be set in their ways regarding the lighting and flow they like. You may get a little browning as it adjusts to it's new home but if everything goes well it will start growing pretty quickly Mini colonies are also prone to having deteitus build up in between the branches so be sure to keep an eye on that and adjust flow as necessary.
My last mini-colony was stunted, as far as growth goes, for about 3 months and then it started taking off again. It was entirely bright green when I first got it but it's steadily changed to have a dark purple base around the base of the branches with bright green polyps and base color towards the tips.