Creating a nice looking desktop in OpenBox WM is not an easy thing.
There are a few bricks you need to include to create a nice and good looking desktop.
GTK theme, OpenBox window decorations, matching wallpaper are the absolute minimum. It would also be worth adding the matching Conky and panel decor.
Mabox provides several ready to use, predefined themes.
Each of them includes:
– GTK theme
– Openbox windows decoration
– Tint2 panel theme
– Conky configurations
– and the theme of the Menu and Side Panels (based on jgmenu)