I am a little bit colour blind
So I often have problems with the standard colour choices of many programs and need to tweak them. This is often mindboggingly frustrating depending on what program you use. Therefore it is an important criterion for me, if the program I use either just has an palette I can live with or is customizable in all the right places. Ideally it uses the colour choices I make somewhere centrally and I don't have to bother.
Solarized
Solarized is a theme with the colour blind in mind and works very well for me, so I try to use it wherever I can.
https://github.com/altercation/solarized
base03 #002b36 background
base02 #073642 background
base01 #586e75 content
base00 #657b83 content
base0 #839496 content
base1 #93a1a1 content
base2 #eee8d5 background
base3 #fdf6e3 background
yellow #b58900 accent
orange #cb4b16 accent
red #dc322f accent
magenta #d33682 accent
violet #6c71c4 accent
blue #268bd2 accent
cyan #2aa198 accent
green #859900 accent