Based on vim-noctu
Actually, this color scheme has a more specific use. Rather than specifying particular color values for Vim, I prefer to have consistent colors across all software that I use in the terminal (e.g., colored output from git, tmux's status bar, etc.). Towards that end, this scheme is restricted to 16 ANSI colors (0 through 15), the representation of which can be redefined by configuring your terminal emulator. This means that you can change your color scheme "globally" without having to edit this script.