gcolor2 software package provides Simple GTK2 color selector and picker, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gcolor2
gcolor2 is installed in your system.
Make ensure the gcolor2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep gcolor2 *
You will get with gcolor2 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | GNOME |
| Package | gcolor2 |
| Version | 0.4-2.1ubuntu1 |
| Description | Simple GTK2 color selector and picker |
| Sub Section | GNOME |