GTKores is a simple color picking tool, written in GTK+ and C, intended to run under Linux and systems where GTK can be instaled.
It was firstly written for my own use, to make color picking easier when writing CSS pages (where hexadecimals values are needed to represent colors), and also in other small tasks. I've used Glade to build the graphical interface.
It's a very small program that loads quickly. If you don't have too much patience
(and, maybe, memory =P) and want simplicity in color picking, so GTKores is made for you.