Nevermind; I only needed parentheses around the value.
gconftool-2 -s -t string /desktop/gnome/interface/gtk_color_scheme "fg_color:#000000000000 bg_color:#eaeae8e8e3e3 text_color:#000000000000 base_color:#ffffffffffff selected_fg_color:#ffffffffffff selected_bg_color:#8a8a7474baba"
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I'm trying to edit this key:

/desktop/gnome/interface/gtk_color_scheme
Screenshot

It gives me a list of properties and their colors.
Screenshot

However, I don't exactly know how to set this thing. I tried doing this:

gconftool-2 -s -t string /desktop/gnome/interface/gtk_color_scheme fg_color:#000000000000 bg_color:#eaeae8e8e3e3 text_color:#000000000000 base_color:#ffffffffffff selected_fg_color:#ffffffffffff selected_bg_color:#8a8a7474baba
If you looked at the photo, you notice there is a weird, square character. I don't know if gedit can replicate that.

It looks simple enough, but it isn't. This command did not work. It seems like there is a certain way of setting this string, but I don't know how. I figured maybe one of you do.