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Humanity Colors 14.04.3 includes 3 new colors: Manila, Aqua, Teal, bringing the icon theme to a total of 12 colors variations (the theme already included the following colors: blue, brown, graphite, green, orange - different from the default Humanity orange -, pink, purple, red and yellow), all available for both dark and light panels.

The new version also brings "darker, crisper and way better looking overall colors" for the whole icon theme pack, according to Jared Sot, one of the Ravefinity designers:

It's also worth mentioning that the icon theme no longer requires Humanity and Ubuntu Mono icon themes to be installed, these being bundled with the theme. Because of this, Humanity Colors now uses about 90-100 mb of HDD space.

As a reminder, Humanity Colors icon theme pack should work with Unity, GNOME (Shell), Xfce, LXDE, Openbox and probably other DEs/shells too.

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

For other Linux distributions, grab Humanity colors from the Ravefinity website.

To change the icon 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. Make sure to set Humanity-dark-COLORX icon themes for dark panels and Humanity-light-COLORX for light panels.