diff --git a/README.md b/README.md
index 4363290..5e15e07 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,17 @@ let
 in {}
 ```
 
+If you want to create your own theme based on an included theme, you can do this:
+
+```nix
+let
+  myTheme = themes.custom (themes.raw.tango // {
+    base00 = "2E3436";
+    accent = themes.raw.tango.base0A; # Custom properties also work!
+  })
+in {}
+```
+
 <details>
 <summary>All themes</summary>
 
diff --git a/flake.nix b/flake.nix
index 2fe8443..50a1cd8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,6 +2,8 @@
   description = "Theme your NixOS configuration consistently.";
 
   outputs = { self }: {
+    raw = import ./themes.nix;
+
     custom = theme: let
       onlyColors = builtins.removeAttrs theme [ "name" "author" ];
 
@@ -15,5 +17,5 @@
       tmTheme       = (import ./templates/tmTheme.nix) themeFull;
       adwaitaGtkCss = (import ./templates/adwaitaGtkCss.nix) themeFull;
     };
-  } // builtins.mapAttrs (name: self.custom) (import ./themes.nix);
+  } // builtins.mapAttrs (name: self.custom) self.raw;
 }