diff --git a/home/default.nix b/home/default.nix
index cc7cb84..22ffb90 100644
--- a/home/default.nix
+++ b/home/default.nix
@@ -4,6 +4,7 @@
     ./emacs.nix
     ./flameshot.nix
     ./secrets
+    ./themes
     ./tmux.nix
     ./x
   ];
diff --git a/home/themes/color.nix b/home/themes/color.nix
new file mode 100644
index 0000000..46ce77e
--- /dev/null
+++ b/home/themes/color.nix
@@ -0,0 +1,9 @@
+{ lib }:
+let
+  mkColorOption = with lib; {default ? "#000000", description ? "" }: mkOption {
+    inherit description default;
+    example = "#abcdef";
+    type = types.strMatching "#[0-9a-f]{6}";
+  };
+in
+mkColorOption
diff --git a/home/themes/default.nix b/home/themes/default.nix
new file mode 100644
index 0000000..2f7e73d
--- /dev/null
+++ b/home/themes/default.nix
@@ -0,0 +1,22 @@
+{ config, lib, ... }:
+with lib;
+let
+  themeType = types.submodule {
+    options = {
+      i3Theme = mkOption {
+        type = import ./i3.nix { inherit lib; };
+      };
+    };
+  };
+in
+{
+  options.my.home = {
+    theme = mkOption {
+      type = themeType;
+    };
+
+    themes = mkOption {
+      type = with types; attrsOf themeType;
+    };
+  };
+}
diff --git a/home/themes/i3.nix b/home/themes/i3.nix
new file mode 100644
index 0000000..9e9d72d
--- /dev/null
+++ b/home/themes/i3.nix
@@ -0,0 +1,183 @@
+{ lib }:
+with lib;
+let
+  mkColorOption = import ./color.nix { inherit lib; };
+
+  barColorSetModule = types.submodule {
+    options = {
+      border = mkColorOption {};
+      background = mkColorOption {};
+      text = mkColorOption {};
+    };
+  };
+
+  colorSetModule = types.submodule {
+    options = {
+      border = mkColorOption {};
+      childBorder = mkColorOption {};
+      background = mkColorOption {};
+      text = mkColorOption {};
+      indicator = mkColorOption {};
+    };
+  };
+in
+types.submodule {
+  options = {
+    bar = mkOption {
+      type = types.submodule {
+        options = {
+          background = mkColorOption {
+            default = "#000000";
+            description = "Background color of the bar.";
+          };
+
+          statusline = mkColorOption {
+            default = "#ffffff";
+            description = "Text color to be used for the statusline.";
+          };
+
+          separator = mkColorOption {
+            default = "#666666";
+            description = "Text color to be used for the separator.";
+          };
+
+          focusedWorkspace = mkOption {
+            type = barColorSetModule;
+            default = {
+              border = "#4c7899";
+              background = "#285577";
+              text = "#ffffff";
+            };
+            description = ''
+                    Border, background and text color for a workspace button when the workspace has focus.
+                  '';
+          };
+
+          activeWorkspace = mkOption {
+            type = barColorSetModule;
+            default = {
+              border = "#333333";
+              background = "#5f676a";
+              text = "#ffffff";
+            };
+            description = ''
+                    Border, background and text color for a workspace button when the workspace is active.
+                  '';
+          };
+
+          inactiveWorkspace = mkOption {
+            type = barColorSetModule;
+            default = {
+              border = "#333333";
+              background = "#222222";
+              text = "#888888";
+            };
+            description = ''
+                    Border, background and text color for a workspace button when the workspace does not
+                    have focus and is not active.
+                  '';
+          };
+
+          urgentWorkspace = mkOption {
+            type = barColorSetModule;
+            default = {
+              border = "#2f343a";
+              background = "#900000";
+              text = "#ffffff";
+            };
+            description = ''
+                    Border, background and text color for a workspace button when the workspace contains
+                    a window with the urgency hint set.
+                  '';
+          };
+
+          bindingMode = mkOption {
+            type = barColorSetModule;
+            default = {
+              border = "#2f343a";
+              background = "#900000";
+              text = "#ffffff";
+            };
+            description =
+              "Border, background and text color for the binding mode indicator";
+          };
+        };
+      };
+    };
+
+    background = mkOption {
+      type = types.str;
+      default = "#ffffff";
+      description = ''
+        Background color of the window. Only applications which do not cover
+        the whole area expose the color.
+      '';
+    };
+
+    focused = mkOption {
+      type = colorSetModule;
+      default = {
+        border = "#4c7899";
+        background = "#285577";
+        text = "#ffffff";
+        indicator = "#2e9ef4";
+        childBorder = "#285577";
+      };
+      description = "A window which currently has the focus.";
+    };
+
+    focusedInactive = mkOption {
+      type = colorSetModule;
+      default = {
+        border = "#333333";
+        background = "#5f676a";
+        text = "#ffffff";
+        indicator = "#484e50";
+        childBorder = "#5f676a";
+      };
+      description = ''
+        A window which is the focused one of its container,
+        but it does not have the focus at the moment.
+      '';
+    };
+
+    unfocused = mkOption {
+      type = colorSetModule;
+      default = {
+        border = "#333333";
+        background = "#222222";
+        text = "#888888";
+        indicator = "#292d2e";
+        childBorder = "#222222";
+      };
+      description = "A window which is not focused.";
+    };
+
+    urgent = mkOption {
+      type = colorSetModule;
+      default = {
+        border = "#2f343a";
+        background = "#900000";
+        text = "#ffffff";
+        indicator = "#900000";
+        childBorder = "#900000";
+      };
+      description = "A window which has its urgency hint activated.";
+    };
+
+    placeholder = mkOption {
+      type = colorSetModule;
+      default = {
+        border = "#000000";
+        background = "#0c0c0c";
+        text = "#ffffff";
+        indicator = "#000000";
+        childBorder = "#0c0c0c";
+      };
+      description = ''
+        Background and text color are used to draw placeholder window
+        contents (when restoring layouts). Border and indicator are ignored.
+      '';
+    };
+  };
+}