2.7.3 introduces a new gtk/window theme, a modified version of a theme called Ninix. This theme compliments the Moka icon set, and is similar to the Numix Light theme. The original Ninix theme is also included.
Sadly, the LXDE Control Center has a bug in testing where it will not launch. This will be fixed in the next release, and only occurs occasionally.
Please leave your thoughts on the new theme in the comments below, and visit the Newt OS Website by clicking the link at the top of the page.