$ apt-cache search gpick
<returns nothing>

apt-cache search gpick
gpick - advanced GTK+ color picker

sudo apt-get install gcolor2

sudo apt-get install agave

$ gpick
gpick: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by gpick)

$ LD_LIBRARY_PATH=/home/user/Desktop/libstdc++6_4.6.3-1ubuntu5_i386/usr/lib/i386-linux-gnu gpick
gpick: symbol lookup error: gpick: undefined symbol: g_dbus_object_manager_server_new

$ grabc
#f47276
244,114,118