Here's how you can install the Ambiance and Radiance Colors theme in Linux Mint 16. This theme will let you use different colors on your Linux Mint 16 desktop.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:noobslab/themes
sudo apt-get update
sudo apt-get install ambiance-radiance-colors
Ambiance & Radiance Colors Suite is offers many colors of default Ubuntu themes (Ambiance & Radiance), a Unique and complete GTK 2 & 3 theme that brings you Ubuntu's Default Ambiance and Radiance Themes in 9 awesome new colors!More at Noobs Lab
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