As I recall (but don't quote me on this) at least one high contrast horizontal site scheme was supposed to be in the works, but there was also some question as to how many different site schemes the site is going to support. (Giving more choices actually starts to impede usability, so it's a bad idea to let everyone simply reconfigure the site to their own tastes.)
At the moment, Lynx is a black on white scheme, and you might want to check out Celerity, which has dark brown text on an off-white background.
Re: change color of text in Tropospherical Red scheme
As I recall (but don't quote me on this) at least one high contrast horizontal site scheme was supposed to be in the works, but there was also some question as to how many different site schemes the site is going to support. (Giving more choices actually starts to impede usability, so it's a bad idea to let everyone simply reconfigure the site to their own tastes.)
At the moment, Lynx is a black on white scheme, and you might want to check out Celerity, which has dark brown text on an off-white background.