chameleon-cursor-theme software package provides modern but not gaudy X11 mouse theme, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install chameleon-cursor-theme
chameleon-cursor-theme is installed in your system.
Make ensure the chameleon-cursor-theme package were installed using the commands given below,
$ sudo dpkg-query -l | grep chameleon-cursor-theme *
You will get with chameleon-cursor-theme package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | X Window System software |
| Package | chameleon-cursor-theme |
| Version | 0.5-5 |
| Description | modern but not gaudy X11 mouse theme |
| Sub Section | X87 |