I haven't looked into how one can export gnome-terminal color palettes yet, but if anyone else is interested, I think these are the correct settings in gconf:
Edit: Ok, I pulled down the source for gnome-terminal since I couldn't find a way to export/import color schemes. The color palettes are all hard-coded, so that is unfortunate :(.
agreed, but there is no mechanism for importing/exporting additional color schemes (I guess you could export an entire profile, but that entails quite a bit more than just color schemes).