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*mini.hues* Generate configurable color scheme
MIT License Copyright (c) 2023 Evgeni Chasnovski
------------------------------------------------------------------------------
*MiniHues*
Features:
- Required to set two base colors: background and foreground.
Their shades and other non-base colors are computed to be as much
perceptually different as reasonably possible.
See |MiniHues.config| for setup inspiration.
- Configurable:
- Number of hues used for non-base colors (from 0 to 8).
- Saturation level ("low", "lowmedium", "medium", "mediumhigh", "high").
- Accent color used for some selected UI elements.
- Plugin integration (can be selectively enabled for faster startup).
- Random generator for base colors. See |MiniHues.gen_random_base_colors()|.
Powers |randomhue| color scheme.
- Lua function to compute palette used in color scheme.
See |MiniHues.make_palette()|.
- Bundled color schemes. See |MiniHues-color-schemes|.
Supported highlight groups:
- All built-in UI and syntax groups.
- Built-in Neovim LSP and diagnostic.
- Tree-sitter (|treesitter-highlight-groups|).
- LSP semantic tokens (|lsp-semantic-highlight|).
- Plugins (either with explicit definition or by verification that default
highlighting works appropriately):
- [nvim-mini/mini.nvim](https://nvim-mini.org/mini.nvim)
- [akinsho/bufferline.nvim](https://github.com/akinsho/bufferline.nvim)
- [anuvyklack/hydra.nvim](https://github.com/anuvyklack/hydra.nvim)
- [DanilaMihailov/beacon.nvim](https://github.com/DanilaMihailov/beacon.nvim)
- [folke/lazy.nvim](https://github.com/folke/lazy.nvim)
- [folke/noice.nvim](https://github.com/folke/noice.nvim)
- [folke/snacks.nvim](https://github.com/folke/snacks.nvim)
- [folke/todo-comments.nvim](https://github.com/folke/todo-comments.nvim)
- [folke/trouble.nvim](https://github.com/folke/trouble.nvim)
- [folke/which-key.nvim](https://github.com/folke/which-key.nvim)
- [ggandor/leap.nvim](https://github.com/ggandor/leap.nvim)
- [glepnir/dashboard-nvim](https://github.com/glepnir/dashboard-nvim)
- [glepnir/lspsaga.nvim](https://github.com/glepnir/lspsaga.nvim)
- [HiPhish/rainbow-delimiters.nvim](https://github.com/HiPhish/rainbow-delimiters.nvim)
- [hrsh7th/nvim-cmp](https://github.com/hrsh7th/nvim-cmp)
- [ibhagwan/fzf-lua](https://github.com/ibhagwan/fzf-lua)
- [justinmk/vim-sneak](https://github.com/justinmk/vim-sneak)
- [kevinhwang91/nvim-bqf](https://github.com/kevinhwang91/nvim-bqf)
- [kevinhwang91/nvim-ufo](https://github.com/kevinhwang91/nvim-ufo)
- [lewis6991/gitsigns.nvim](https://github.com/lewis6991/gitsigns.nvim)
- [lukas-reineke/indent-blankline.nvim](https://github.com/lukas-reineke/indent-blankline.nvim)
- [MeanderingProgrammer/render-markdown.nvim](https://github.com/MeanderingProgrammer/render-markdown.nvim)
- [neoclide/coc.nvim](https://github.com/neoclide/coc.nvim)
- [NeogitOrg/neogit](https://github.com/NeogitOrg/neogit)
- [nvim-lualine/lualine.nvim](https://github.com/nvim-lualine/lualine.nvim)
- [nvim-neo-tree/neo-tree.nvim](https://github.com/nvim-neo-tree/neo-tree.nvim)
- [nvim-telescope/telescope.nvim](https://github.com/nvim-telescope/telescope.nvim)
- [nvim-tree/nvim-tree.lua](https://github.com/nvim-tree/nvim-tree.lua)
- [OXY2DEV/helpview.nvim](https://github.com/OXY2DEV/helpview.nvim)
- [OXY2DEV/markview.nvim](https://github.com/OXY2DEV/markview.nvim)
- [phaazon/hop.nvim](https://github.com/phaazon/hop.nvim)
- [rcarriga/nvim-dap-ui](https://github.com/rcarriga/nvim-dap-ui)
- [rcarriga/nvim-notify](https://github.com/rcarriga/nvim-notify)
- [rlane/pounce.nvim](https://github.com/rlane/pounce.nvim)
- [romgrk/barbar.nvim](https://github.com/romgrk/barbar.nvim)
- [saghen/blink.cmp](https://github.com/saghen/blink.cmp)
- [stevearc/aerial.nvim](https://github.com/stevearc/aerial.nvim)
- [williamboman/mason.nvim](https://github.com/williamboman/mason.nvim)
# Setup ~
This module needs a setup with `require('mini.hues').setup({})` and
MANDATORY `background` AND `foreground` FIELDS (add more fields to fit
your taste). It will create global Lua table `MiniHues` which you can use
for scripting or manually (with `:lua MiniHues.*`).
See |MiniHues.config| for `config` structure and default values.
This module doesn't have runtime options, so using `vim.b.minihues_config`
will have no effect here.
Example: >lua
require('mini.hues').setup({
background = '#11262d',
foreground = '#c0c8cc',
plugins = {
default = false,
['nvim-mini/mini.nvim'] = true,
},
})
<
# Notes ~
- This is used to create some of plugin's color schemes
(see |MiniHues-color-schemes|).
- Using `setup()` doesn't actually create a colorscheme. It basically
creates a coordinated set of |highlight-groups|. To create your own scheme:
- Put "myscheme.lua" file (name after your chosen theme name) inside
any "colors" directory reachable from |'runtimepath'| ("colors" inside
your Neovim config directory is usually enough).
- Inside "myscheme.lua" call `require('mini.hues').setup()` with your
palette and only after that set |g:colors_name| to "myscheme".
- This module doesn't define |cterm-colors| for implementation simplicity.
It only works if |'termguicolors'| is enabled (should be done automatically
if the terminal emulator supporst 24-bit colors). If not possible,
use |MiniColors-colorscheme:add_cterm_attributes()| from |mini.colors|
to define custom color scheme with 16-color support.
------------------------------------------------------------------------------
*MiniHues-color-schemes*
Bundled color schemes
- *minischeme* : blue and yellow main color scheme.
- *miniwinter* : "icy winter" palette with azure background.
- *minispring* : "blooming spring" palette with green background.
- *minisummer* : "hot summer" palette with brown/yellow background.
- *miniautumn* : "cooling autumn" palette with purple background.
- *randomhue* : uses randomly generated same hue background and foreground.
Every `:colorscheme randomhue` call results in a different (randomly yet
carefully selected) colors.
It is essentially a combination of calls to |MiniHues.setup()| and
|MiniHues.gen_random_base_colors()| with slight adjustments for |'background'|.
Activate it as regular |:colorscheme|. Get currently active config with
`:lua print(vim.inspect(MiniHues.config))`.
------------------------------------------------------------------------------
*MiniHues.setup()*
`MiniHues.setup`({config})
Module setup
Main side effect is to create palette and apply it. Essentially, a combination
of |MiniHues.make_palette()| and |MiniHues.apply_palette()|.
Usage ~
>lua
require('mini.hues').setup({
-- Use config table as you like
-- Needs both `background` and `foreground` fields present
background = '#11262d',
foreground = '#c0c8cc',
})
<
------------------------------------------------------------------------------
*MiniHues.config*
`MiniHues.config`
Defaults ~
>lua
MiniHues.config = {
-- REQUIRED base colors as '#rrggbb' hex strings
background = nil,
foreground = nil,
-- Number of hues used for non-base colors
n_hues = 8,
-- Saturation. One of 'low', 'lowmedium', 'medium', 'mediumhigh', 'high'.
saturation = 'medium',
-- Accent color. One of: 'bg', 'fg', 'red', 'orange', 'yellow', 'green',
-- 'cyan', 'azure', 'blue', 'purple'
accent = 'bg',
-- Plugin integrations. Use `default = false` to disable all integrations.
-- Also can be set per plugin (see |MiniHues.config|).
plugins = { default = true },
-- Whether to auto adjust highlight groups based on certain events
autoadjust = true,
}
<
See |MiniHues.make_palette()| for more information about how certain settings
affect output color scheme.
# Plugin integrations ~
`config.plugins` defines for which supported plugins highlight groups will
be created. Limiting number of integrations slightly decreases startup time.
It is a table with boolean (`true`/`false`) values which are applied as follows:
- If plugin name (as listed in |mini.hues|) has entry, it is used.
- Otherwise `config.plugins.default` is used.
Example which will load only "mini.nvim" integration: >lua
require('mini.hues').setup({
background = '#11262d',
foreground = '#c0c8cc',
plugins = {
default = false,
['nvim-mini/mini.nvim'] = true,
},
})
<
# Auto adjust ~
`config.autoadjust` defines whether to adjust some highlight groups based on
events relevant to them. Currently adjusted groups:
- |hl-MsgSeparator| is adjusted based on `msgsep` flag in |'fillchars'|.
If it is whitespace - highlight background, otherwise - foreground.
- |hl-Pmenu| is adjusted based on |'pumborder'| value (on Neovim>=0.12).
If it results in a border - same as floating window (but with no accent
foreground in border), otherwise - same as |hl-CursorLine|. This design
makes |ins-completion-menu| stand out from regular floating windows.
# Examples ~
*MiniHues-examples*
Here are some possible setup configurations (copy first line and then use
only one `setup` call): >lua
local setup = require('mini.hues').setup
-- Choose background and foreground
setup({ background = '#2f1c22', foreground = '#cdc4c6' }) -- red
setup({ background = '#2f1e16', foreground = '#cdc5c1' }) -- orange
setup({ background = '#282211', foreground = '#c9c6c0' }) -- yellow
setup({ background = '#1c2617', foreground = '#c4c8c2' }) -- green
setup({ background = '#112723', foreground = '#c0c9c7' }) -- cyan
setup({ background = '#11262d', foreground = '#c0c8cc' }) -- azure
setup({ background = '#1d2231', foreground = '#c4c6cd' }) -- blue
setup({ background = '#281e2c', foreground = '#c9c5cb' }) -- purple
-- Choose number of accent colors
setup({ background = '#11262d', foreground = '#c0c8cc', n_hues = 6 })
setup({ background = '#11262d', foreground = '#c0c8cc', n_hues = 4 })
setup({ background = '#11262d', foreground = '#c0c8cc', n_hues = 2 })
setup({ background = '#11262d', foreground = '#c0c8cc', n_hues = 0 })
-- Choose saturation of colored text
setup({ background = '#11262d', foreground = '#c0c8cc', saturation = 'low' })
setup({ background = '#11262d', foreground = '#c0c8cc', saturation = 'lowmedium' })
setup({ background = '#11262d', foreground = '#c0c8cc', saturation = 'medium' })
setup({ background = '#11262d', foreground = '#c0c8cc', saturation = 'mediumhigh' })
setup({ background = '#11262d', foreground = '#c0c8cc', saturation = 'high' })
-- Choose accent color
setup({ background = '#11262d', foreground = '#c0c8cc', accent = 'bg' })
setup({ background = '#11262d', foreground = '#c0c8cc', accent = 'red' })
setup({ background = '#11262d', foreground = '#c0c8cc', accent = 'yellow' })
setup({ background = '#11262d', foreground = '#c0c8cc', accent = 'cyan' })
setup({ background = '#11262d', foreground = '#c0c8cc', accent = 'blue' })
<
------------------------------------------------------------------------------
*MiniHues.make_palette()*
`MiniHues.make_palette`({config})
# Make palette ~
General idea of palette generation is that it is mostly based on color channel
information extracted from base colors (background and foreground).
All operations are done inside `Oklch` color space, meaning that each color
is defined by three numbers:
- Lightness (`l`) - number between 0 (black) and 100 (white) describing how
light is a color.
- Chroma (`c`) - positive number describing how colorful is a color (bigger
values - more colorful; 0 is gray).
- Hue (`h`) - periodic number in [0, 360) describing a value of "true color"
on color circle/wheel.
For more details about `Oklch` see |MiniColors-color-spaces| or
https://bottosson.github.io/posts/oklab/.
## Algorithm overview ~
- Extract lightness, chroma, and hue of base colors.
- Generate reference lightness values:
- Background edge: 0 or 100, whichever is closest to background lightness.
- Foreground edge: 0 or 100, different from background edge.
- Middle: arithmetic mean of background and foreground lightness values.
- Compute background and foreground tints and shades by changing lightness
of background color: two colors closer to background lightness edge and
two closer to middle.
- Pick chroma value for non-base colors based on `config.saturation`.
- Generate hues for non-base colors:
- Fit an equidistant circular grid with `config.n_hues` points to be as
far from both background and foreground hues. This will ensure that
non-base colors are as different as possible from base ones (for
better visual perception).
Example: for background hue 0, foreground hue 180, and `config.n_hues` 2
the output grid will be `{ 90, 270 }`.
- For each hue of reference color (which itself is an equidistant grid
of 8 hues) compute the closest value from the grid. This allows
operating in same terms (like "red", "green") despite maybe actually
having less different hues.
- Compute for each hue two variants of non-base colors: with background and
foreground lightness values.
- Compute two variants of accent color (with background and foreground
lightness) based on `config.accent`.
Notes:
- Some output colors can have not exact values of generated Oklch channels.
This is due to actually computed colors being impossible to represent via
`'#rrggbb'` hex string. In this case a process called gamut clipping is done
to reduce lightness and chroma in optimal way while maintaining same hue.
For more information see |MiniColors-gamut-clip|.
- Not all colors are actually used in highlight groups and are present for the
sake of completeness.
Parameters ~
{config} `(table)` Configuration for palette. Same structure as |MiniHues.config|.
Needs to have <background> and <foreground> fields.
Return ~
`(table)` Palette with the following fields:
- <bg> and <fg> with supplied `background` and `foreground` colors.
- Fields like <bg_xxx> and <fg_xxx> are essentially <bg> and <fg> but with
different lightness values: `_edge`/`_edge2` - closer to edge lightness,
`_mid`/`_mid2` - closer to middle lightness.
- Fields for non-base colors (<red>, <orange>, <yellow>, <green>, <cyan>,
<azure>, <blue>, <purple>) have the same lightness as foreground.
- Fields for non-base colors with <_bg> suffix have the same lightness as
background.
- <accent> and <accent_bg> represent accent colors with foreground and
background lightness values.
See also ~
|MiniHues.get_palette()|
------------------------------------------------------------------------------
*MiniHues.apply_palette()*
`MiniHues.apply_palette`({palette}, {plugins}, {opts})
Apply palette
Create color scheme highlight groups and terminal colors based on supplied
palette. This is useful if you want to tweak palette colors.
For regular usage prefer |MiniHues.setup()|.
Parameters ~
{palette} `(table)` Table with structure as |MiniHues.make_palette()| output.
{plugins} `(table|nil)` Table with boolean values indicating whether to create
highlight groups for specific plugins. See |MiniHues.config| for more details.
Default: the value from |MiniHues.config|.
{opts} `(table|nil)` Options. Possible fields:
- <autoadjust> - whether to auto adjust some highlight groups when needed.
Default: value of `autoadjust` in |MiniHues.config|.
Usage ~
>lua
local palette = require('mini.hues').make_palette({
background = '#11262d',
foreground = '#c0c8cc',
})
palette.cyan = '#76e0a6'
palette.cyan_bg = '#004629'
require('mini.hues').apply_palette(palette)
<
See also ~
|MiniHues.get_palette()|
------------------------------------------------------------------------------
*MiniHues.get_palette()*
`MiniHues.get_palette`()
Get latest applied palette
Return ~
`(table)` Table with structure as |MiniHues.make_palette()| output that was
the latest applied (via |MiniHues.apply_palette()|) palette.
------------------------------------------------------------------------------
*MiniHues.gen_random_base_colors()*
`MiniHues.gen_random_base_colors`({opts})
Generate random base colors
Compute background and foreground colors based on randomly generated hue
and heuristically picked lightness-chroma values.
You can recreate a similar functionality but tweaked to your taste
using |mini.colors|: >lua
local convert = require('mini.colors').convert
local hue = math.random(0, 359)
return {
background = convert({ l = 15, c = 3, h = hue }, 'hex'),
foreground = convert({ l = 80, c = 1, h = hue }, 'hex'),
}
<
Notes:
- Respects |'background'| (uses different lightness and chroma values for
"dark" and "light" backgrounds).
- When used during startup, might require usage of `math.randomseed()` for
proper random generation. For example: >lua
local hues = require('mini.hues')
math.randomseed(vim.uv.hrtime())
hues.setup(hues.gen_random_base_colors())
<
Parameters ~
{opts} `(table|nil)` Options. Possible values:
- <gen_hue> `(function)` - callable which will return single number for
output hue. Can be used to limit which hues will be generated.
Default: random integer between 0 and 359.
Return ~
`(table)` Table with <background> and <foreground> fields containing
color hex strings.
vim:tw=78:ts=8:noet:ft=help:norl: