I use the Gnome Tango colour scheme http://tango.freedesktop.org/Tango_Icon_Theme_Guidelines http://tango.freedesktop.org/Tango_Icon_Theme_Guidelines where poss

I use the Gnome Tango colour scheme http://tango.freedesktop.org/Tango_Icon_Theme_Guidelines http://tango.freedesktop.org/Tango_Icon_Theme_Guidelines where possible. I find it has good contrast between colours in general. In particular I can actually read the blue it uses on a black background. Most of the colours have good contrast with each other even at extremely low saturation too. For my vision there are some small tweaks I sometimes make to it but it is generally the most agreeable match to my abnormality I've found in a preset so far.