moonfly is a dark charcoal theme for modern Neovim and classic Vim.

Note, all moonfly highlights in Neovim are implemented in Lua, whilst highlights in Vim are implemented in legacy Vimscript.

👉 I maintain another dark theme named nightfly which may be of interest.

Screenshot

Styled Features & Plugins

Neovim-only:

• Neovim Tree-sitter
• Neovim Diagnostic
• Neovim LSP Semantic Highlights
• Barbar
• Dashboard
• Gitsigns
• Hop
• Indent BlankLine
• Lazy
• lspsaga.nvim
• Lualine
• mason.nvim
• Mini
• Neo-tree
• Neogit
• Noice
• nvim-cmp
• nvim-dap-ui
• nvim-navic
• nvim-notify
• NvCheatsheet.nvim
• NvimTree
• Rainbow Delimiters
• Telescope

Neovim & Vim compatible:

• BufExplorer
• clever-f
• CtrlP
• Fern
• fzf.vim (works best with matching fly16 bat theme)
• lightline
• Tagbar
• vim-airline

Vim-only:

• ALE
• GitGutter
• indentLine
• NERDTree
• Signify

⚡ Requirements

moonfly is now a GUI-only colorscheme.

A GUI client or a modern terminal version of Vim or Neovim in a true-color terminal is required. Details about true-color terminals are listed here.

moonfly explicitly no longer supports the 256 color cterm version of Vim or Neovim except via the legacy cterm-compat branch.

Installation

Install the bluz71/vim-moonfly-colors colorscheme with your preferred plugin manager.

lazy.nvim:

{ "bluz71/vim-moonfly-colors", name = "moonfly", lazy = false, priority = 1000 },

vim-plug:

Plug 'bluz71/vim-moonfly-colors', { 'as': 'moonfly' }

Usage

Enable the colorscheme after the plugin declaration.

" Vimscript initialization file
colorscheme moonfly

-- Lua initialization file
vim.cmd [[colorscheme moonfly]]

Statusline

• The moonfly theme supports lightline. To enable the moonfly lightline theme please add the following to your initialization file:

let g:lightline = { 'colorscheme': 'moonfly' }

• The moonfly theme supports vim-airline. The moonfly theme will load once vim-airline starts.

• The moonfly theme supports lualine. The moonfly theme will load once Lualine starts.

• My linefly statusline plugin supports the moonfly theme.

• Lastly, my legacy mistfly-statusline plugin also supports the moonfly theme.

🔧 Options

Option	Default State
moonflyCursorColor	Disabled
moonflyItalics	Enabled
moonflyNormalFloat	Disabled
moonflyTerminalColors	Enabled
moonflyTransparent	Disabled
moonflyUndercurls	Enabled
moonflyUnderlineMatchParen	Disabled
moonflyVirtualTextColor	Disabled
moonflyWinSeparator	1

---

moonflyCursorColor

The moonflyCursorColor option specifies whether to color the cursor or not. By default the cursor will NOT be colored. If you prefer a colored cursor then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyCursorColor = v:true

-- Lua initialization file
vim.g.moonflyCursorColor = true

---

moonflyItalics

The moonflyItalics option specifies whether to use italics for comments and certain HTML elements in GUI versions of Vim. By default this option is enabled. If you do not like the appearance of italics then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyItalics = v:false

-- Lua initialization file
vim.g.moonflyItalics = false

---

moonflyNormalFloat

The moonflyNormalFloat option specifies whether to use moonfly background and foreground colors in Neovim floating windows. By default this option is disabled, hence, Neovim floating windows will usually be styled with popup menu colors. If you would like to use moonfly colors instead then add the following to your configuration:

" Vimscript initialization file
let g:moonflyNormalFloat = v:true

-- Lua initialization file
vim.g.moonflyNormalFloat = true

💡 If the above option is set then it is highly recommended to enable floating window borders to distinguish between the edit and floating windows in Neovim's LSP client, for example:

  vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
    vim.lsp.handlers.hover, {
      border = "single"
    }
  )
  vim.lsp.handlers['textDocument/signatureHelp'] = vim.lsp.with(
    vim.lsp.handlers.signatureHelp, {
      border = "single"
    }
  )
  vim.diagnostic.config({ float = { border = "single" } })

💡 Likewise, nvim-cmp may be configured as follows for nicer display when g:moonflyNormalFloat is enabled:

local winhighlight = {
  winhighlight = "Normal:NormalFloat,FloatBorder:FloatBorder,CursorLine:PmenuSel",
}
require('cmp').setup({
  window = {
    completion = cmp.config.window.bordered(winhighlight),
    documentation = cmp.config.window.bordered(winhighlight),
  }
})

---

moonflyTerminalColors

The moonflyTerminalColors option specifies whether to use the moonfly color palette in :terminal windows when termguicolors is set. By default this option is enabled. If you prefer not to use the moonfly color palette for the first 16 terminal colors then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyTerminalColors = v:false

-- Lua initialization file
vim.g.moonflyTerminalColors = false

---

moonflyTransparent

The moonflyTransparent option specifies whether to use an opaque or transparent background in GUI versions of Vim. By default this option is disabled. If you would like a transparent background then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyTransparent = v:true

-- Lua initialization file
vim.g.moonflyTransparent = true

---

moonflyUndercurls

The moonflyUndercurls option specifies whether to use undercurls for spelling and linting errors in GUI versions of Vim, including terminal Vim with termguicolors set. By default this option is enabled. If you do not like the appearance of undercurls then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyUndercurls = v:false

-- Lua initialization file
vim.g.moonflyUndercurls = false

---

moonflyUnderlineMatchParen

The moonflyUnderlineMatchParen option specifies whether to underline matching parentheses. By default this option is disabled. If you want to underline matching parentheses then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyUnderlineMatchParen = v:true

-- Lua initialization file
vim.g.moonflyUnderlineMatchParen = true

---

moonflyVirtualTextColor

The moonflyVirtualTextColor option specifies whether to display diagnostic virtual text in color. By default this option is disabled. If you want to display diagnostic virtual text in color then add the following to your initialization file:

" Vimscript initialization file
let g:moonflyVirtualTextColor = v:true

-- Lua initialization file
vim.g.moonflyVirtualTextColor = true

---

moonflyWinSeparator

The moonflyWinSeparator option specifies the style of window separators:

• 0 will display no window separators

• 1 will display block separators; this is the default

• 2 will diplay line separators

For example, if line separators are desired then add the following to your configuration:

" Vimscript initialization file
let g:moonflyWinSeparator = 2

-- Lua initialization file
vim.g.moonflyWinSeparator = 2

🎁 If using Neovim 0.7 (or later), the following configuration will improve the look of line separators (if option 2 has been chosen) by selecting thicker characters for the separators:

" Vimscript initialization file
set fillchars=horiz:━,horizup:┻,horizdown:┳,vert:┃,vertleft:┨,vertright:┣,verthoriz:╋

-- Lua initialization file
vim.opt.fillchars = { horiz = '━', horizup = '┻', horizdown = '┳', vert = '┃', vertleft = '┫', vertright = '┣', verthoriz = '╋', }

Overriding Highlights

If a certain highlight of this theme does not suit then it is recommended to use an autocmd to override that desired highlight.

For example, if one wishes to highlight functions in bold then simply add the following to your initialization file prior to setting the colorscheme:

" Vimscript initialization file
augroup CustomHighlight
    autocmd!
    autocmd ColorScheme moonfly highlight Function guifg=#74b2ff gui=bold
augroup END

-- Lua initialization file
local custom_highlight = vim.api.nvim_create_augroup("CustomHighlight", {})
vim.api.nvim_create_autocmd("ColorScheme", {
  pattern = "moonfly",
  callback = function()
    vim.api.nvim_set_hl(0, "Function", { fg = "#74b2ff", bold = true })
  end,
  group = custom_highlight,
})

True Color Terminals

Many modern terminals support 24-bit true colors. Current versions of Vim & Neovim, on such terminals, support true colors when the termguicolors option is enabled.

On terminals that support true colors, and when termguicolors is set, the moonfly colorscheme will not require any terminal configuration to emit the correct theme colors.

For the true color moonfly colorscheme to display correctly inside tmux the following setting will usually be required in ~/.tmux.conf:

set -ga terminal-overrides ',xterm-256color:Tc'

Vim, as against Neovim, inside tmux, will also require the following settings be added to the ~/.vimrc file:

let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"

Extra Themes

A collection of moonfly-flavoured themes are provided:

• Alacritty users can copy this theme into their alacritty.toml configuration

• kitty users can use this theme

• WezTerm users can copy this theme into the colors directory and then select the moonfly color_scheme in their wezterm.lua configuration

• iTerm2 users on macOS can import this colorscheme

• Windows Terminal users can copy this theme into their settings.json configuration

• fish shell users can use this theme

For other terminals please configure appropriately with the following colors:

Type	Category	Value	Color
Background	Background	#080808
Foreground	Foreground	#bdbdbd
Bold	Bold	#eeeeee
Cursor	Cursor	#9e9e9e
Cursor Text	Cursor Text	#080808
Selection	Selection	#b2ceee
Selection Text	Selection Text	#080808
Color 1	Black (normal)	#323437
Color 2	Red (normal)	#ff5454
Color 3	Green (normal)	#8cc85f
Color 4	Yellow (normal)	#e3c78a
Color 5	Blue (normal)	#80a0ff
Color 6	Purple (normal)	#cf87e8
Color 7	Cyan (normal)	#79dac8
Color 8	White (normal)	#c6c6c6
Color 9	Black (bright)	#949494
Color 10	Red (bright)	#ff5189
Color 11	Green (bright)	#36c692
Color 12	Yellow (bright)	#c6c684
Color 13	Blue (bright)	#74b2ff
Color 14	Purple (bright)	#ae81ff
Color 15	Cyan (bright)	#85dc85
Color 16	White (bright)	#e4e4e4

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