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Stylix

Stylix is a NixOS module which applies the same color scheme, font and wallpaper to a wide range of applications and desktop environments. In some cases, theming can be activated as early as the bootloader!

It also exports utilities for you to apply the theming to custom parts of your configuration.

Stylix is built using base16.nix, a library which handles the generation of config files from templates provided by the base16 project.

Installation

You can install Stylix using Flakes, for example:

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    stylix.url = "github:danth/stylix";
  };

  outputs = { self, nixpkgs, home-manager, stylix }: {
    nixosConfigurations."<hostname>" = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        home-manager.nixosModules.home-manager
        stylix.nixosModules.stylix
      ];
    };
  };
}

Stylix relies on Home Manager for a lot of its work, so that needs to be imported too.

Wallpaper

To get started, you need to set a wallpaper image.

stylix.image = ./wallpaper.png;

The option accepts derivations as well as paths, so you can fetch a wallpaper directly from the internet:

stylix.image = pkgs.fetchurl {
  url = "https://www.pixelstalk.net/wp-content/uploads/2016/05/Epic-Anime-Awesome-Wallpapers.jpg";
  sha256 = "enQo3wqhgf0FEPHj2coOCvo7DuZv+x5rL/WIo4qPI50=";
};

The wallpaper is the only option which is required!

Color scheme

Automatic color schemes

If you only set a wallpaper, Stylix will use a genetic algorithm to choose a color scheme based on it. The quality of these automatically generated schemes can vary, but more colorful images tend to have better results.

You can force a light or dark theme using the polarity option:

stylix.polarity = "dark";

The generated scheme can be viewed in a web browser at file:///etc/stylix/palette.html.

Mixed color schemes

You can override part of the scheme by hand, perhaps to select background and text colors manually while keeping the generated accent colors:

stylix.palette = {
  base00 = "000000";
  # ...
  base07 = "ffffff";
};

The baseXX names correspond to this table.

Manual color schemes

Alternatively, you can choose a pre-made colorscheme from the Tinted Theming repository. Either add the repository to your Flake inputs, or fetch it as follows:

let base16-schemes = pkgs.fetchFromGitHub {
  owner = "tinted-theming";
  repo = "base16-schemes";
  rev = "...";
  sha256 = "...";
};

Then you can choose which file you would like to use:

stylix.base16Scheme = "${base16-schemes}/gruvbox-dark-hard.yaml";

If you want to do anything more complex - such as running your own program to generate the colour scheme - base16Scheme can accept any argument which mkSchemeAttrs supports.

Fonts

The default combination of fonts is:

stylix.fonts = {
  serif = {
    package = pkgs.dejavu_fonts;
    name = "DejaVu Serif";
  };

  sansSerif = {
    package = pkgs.dejavu_fonts;
    name = "DejaVu Sans";
  };

  monospace = {
    package = pkgs.dejavu_fonts;
    name = "DejaVu Sans Mono";
  };

  emoji = {
    package = pkgs.noto-fonts-emoji;
    name = "Noto Color Emoji";
  };
};

These can be changed as you like.

To make things more uniform, you can replace the serif font with sans-serif:

stylix.fonts.serif = config.stylix.fonts.sansSerif;

Or even use monospace for everything:

stylix.fonts = {
  serif = config.stylix.fonts.monospace;
  sansSerif = config.stylix.fonts.monospace;
  emoji = config.stylix.fonts.monospace;
};

Turning targets on and off

In Stylix terms, a target is anything which can have colors, fonts or a wallpaper applied to it. Each module in this repository should correspond to a target of the same name.

Each target has an option like stylix.targets.«target».enable to turn its styling on or off. Normally, it's turned on automatically when the target is installed. You can set stylix.autoEnable = false to opt out of this behaviour, in which case you'll need to manually enable each target you want to be styled.