Highlight colour in GTK+-2/default theme

[Petter Sundlöf <petter sundlof findus dhs org>]

Hello.
How do I change the highlight/selection colour in GTK+2.0, using the 
default theme?

I lack the capacity to understand 
http://developer.gnome.org/doc/API/2.0/gtk/gtk-Resource-Files.html

and my damaged social skills prohibit me from interacting normally with 
people on IRC to find assistance there.

The solution I use in GTK+-1.2 is to include a ~/.gtkrc.mine in ~/.gtkrc 
and have the gtkrc.mine file include:

style "default"
{
base[NORMAL] = "#efefef"
bg[SELECTED] = "#bfbfbf"
fg[SELECTED] = "#000000"
}

This method does not seem compatible with GTK+-2/~/.gtkrc-2.0.

Best regards,
Petter Sundlöf