.. maybe / maybe not. I've collected / created lots of colour scheme .vssettings xml files over the years, here are some of my favourites... enjoy!
All files are guaranteed to only contain settings for the All Settings->Options->Environment->Fonts and Colours so the rest of your visual studio settings remain untouched. All files are in VS2008 format though they can be edited to work with VS2005 by editing the line :-
<ApplicationIdentity version="9.0" />
<ApplicationIdentity version="8.0" />