FILES DOWNLOAD

Ambiance & Radiance colors is a theme pack that provides Ambiance and Radiance themes in 9 different colors: blue, brown, graphite, green, orange (different than the one used by default in Ubuntu), pink, purple, red and yellow. The pack supports Unity/GNOME as well as Xfce and LXDE/OpenBox.

GTK Theme Preferences (gtk-theme-config) can be used to recolor GTK themes to any color you want however, it doesn't work with Ambiance and Radiance from Ubuntu 14.04 because they use PNGs for checkboxes, progress bars, etc., which can't be changed by this tool.

In my test, the themes worked as expected under Unity, but there's a small glitch under Xfce: the panel text, used by the clock or some indicators, uses a dark color on a dark background, making it unreadable:

sudo add-apt-repository ppa:ravefinity-project/ppa
sudo apt-get update
sudo apt-get install ambiance-colors radiance-colors

To change the theme in Unity, you can use a tool such as Ubuntu Tweak or Unity Tweak Tool. For GNOME Shell, you can change the theme using GNOME Tweak Tool.