A dark Vim color scheme for the GUI and 16/256-color terminals, based on FlatColor, with colors inspired by the excellent One Dark syntax theme for the Atom text editor.

Preview image taken using:

• iTerm2 terminal emulator on Mac OS X
• 12 pt. PragmataPro Mono font
• airline-onedark.vim theme for vim-airline
• vim-polyglot plug-in

1. If you use Vim in the terminal, determine whether your terminal emulator has 24-bit color ("true color") support.

Note that proper colors will always be shown when using GUI Vim, regardless of the configuration done in this step.

• If your terminal emulator DOES support 24-bit color, add the following lines to your ~/.vimrc (this works for Vim patch 7.4.1799 and above, as well as Neovim version 0.1.3 and above; if you use tmux, see the tmux-related notes at the top):

  "Use 24-bit (true-color) mode in Vim/Neovim when outside tmux.
  "If you're using tmux version 2.2 or later, you can remove the outermost $TMUX check and use tmux's 24-bit color support
  "(see < http://sunaku.github.io/tmux-24bit-color.html#usage > for more information.)
  if (empty($TMUX))
    if (has("nvim"))
      "For Neovim 0.1.3 and 0.1.4 < https://github.com/neovim/neovim/pull/2198 >
      let $NVIM_TUI_ENABLE_TRUE_COLOR=1
    endif
    "For Neovim > 0.1.5 and Vim > patch 7.4.1799 < https://github.com/vim/vim/commit/61be73bb0f965a895bfb064ea3e55476ac175162 >
    "Based on Vim patch 7.4.1770 (`guicolors` option) < https://github.com/vim/vim/commit/8a633e3427b47286869aa4b96f2bfc1fe65b25cd >
    " < https://github.com/neovim/neovim/wiki/Following-HEAD#20160511 >
    if (has("termguicolors"))
      set termguicolors
    endif
  endif

• If you [additionally] use older versions of Vim/Neovim than mentioned above, or your terminal emulator DOES NOT support 24-bit color, or you use tmux 2.1 or earlier:

  You have two options, 16-color mode (which is preferred) or 256-color mode. These modes are selected via the g:onedark_termcolors setting. When Vim/Neovim are actively using true-color mode as configured above, the g:onedark_termcolors setting will be be ignored. However, g:onedark_termcolors can still coexist with the configuration above. For instance, when tmux 2.1 or earlier and/or older Vim/Neovim versions are used with the configuration above, g:onedark_termcolors will be honored/not ignored.

  • 16-color mode is the preferred option, since its colors are more accurate than those of 256-color mode. However, you'll need to set your terminal's color palette to this color scheme's custom 16-color palette, since 16-color mode will cause the color scheme to use your terminal emulator's native 16 colors. If you don't use the custom 16-color palette in your terminal emulator when 16-color mode is enabled, the color scheme's colors will not display correctly.

    The canonical version of the 16-color palette is an iTerm2 color scheme called One Dark.itermcolors, which lives in the root of this repository. One Dark.itermcolors only works with the test/beta releases of iTerm2 (versions 2.9.x and later.) You should be able to easily convert the iTerm2 color scheme for use with your terminal emulator of choice by using a tool like termcolors.

    Assuming you're using the custom 16-color palette as described above, add the following line to your ~/.vimrc to enable 16-color mode:

    let g:onedark_termcolors=16

  • 256-color mode is enabled by default with no additional configuration, but colors are less accurate since they are approximated using a 256-color palette. The background color will appear darker, and most other colors will appear brighter. If you don't want to change your terminal's color palette as described in the 16-color mode section above, and your terminal doesn't support 24-bit color, 256-color mode is your only option.

    Although 256-color mode is enabled by default (when not using 24-bit color as described above), you can explicitly enable it by adding the following line to your ~/.vimrc:

    let g:onedark_termcolors=256

2. Place onedark.vim in your ~/.vim/colors/ directory either manually or by using your Vim plug-in manager of choice, then add the following lines to your ~/.vimrc below the lines you added during step 1:

   syntax on
   colorscheme onedark

3. Installing the sheerun/vim-polyglot plug-in is recommended for improved syntax highlighting for various languages, but is not required.

Note: All options should be set before the colorscheme onedark line in your ~/.vimrc.

• g:onedark_termcolors (see Installation (above) before using this setting): Set to 256 for 256-color terminals (the default), or set to 16 to use your terminal emulator's native colors.

• g:onedark_terminal_italics: Set to 1 if your terminal emulator supports italics; 0 otherwise (the default).

A companion vim-airline theme for this color scheme is available at joshdick/airline-onedark.vim.