Recently, I have been using what will become Fedora 21 as my day-to-day machine, (side note: I have found it to be pretty stable for pre-release software). One really nice improvement that i am enjoying on Fedora 21 is the addition of the solarized color scheme in both the default terminal (gnome-terminal), and the default graphical text editior (gedit). Solarized comes in both light and dark variants, and really makes these applications look fantastic and works really well on a wide range of displays and screen brightness levels. From the solarized website:

Solarized is a sixteen color palette (eight monotones, eight accent colors) designed for use with terminal and gui applications. It has several unique properties. I designed this colorscheme with both precise CIELAB lightness relationships and a refined set of hues based on fixed color wheel relationships.

These color schemes are not enabled by default, but are easily switched to in the preferences for both gnome terminal and gedit.