agave software package provides colorscheme designer for the GNOME desktop, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install agave
agave is installed in your system.
Make ensure the agave package were installed using the commands given below,
$ sudo dpkg-query -l | grep agave *
You will get with agave package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | GNOME |
| Package | agave |
| Version | 0.4.7-2.1+b1 |
| Description | colorscheme designer for the GNOME desktop |
| Sub Section | GNOME |