diff --git a/modules/programs/vivid.nix b/modules/programs/vivid.nix
index cdb77fc40..b50b69b65 100644
--- a/modules/programs/vivid.nix
+++ b/modules/programs/vivid.nix
@@ -80,7 +80,7 @@ in
     };
 
     themes = mkOption {
-      type = with types; attrsOf path;
+      type = with types; attrsOf (either path yamlFormat.type);
       default = { };
       example = lib.literalExpression ''
         {
@@ -93,10 +93,27 @@ in
             url = "https://raw.githubusercontent.com/NearlyTRex/Vivid/refs/heads/master/themes/catppuccin-mocha.yml";
             hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
           };
+
+          my-custom-theme = {
+            colors = {
+              blue = "0000ff";
+            };
+            core = {
+              directory = {
+                foreground = "blue";
+                font-style = "bold";
+              };
+            };
+          };
         }
       '';
-      description = "Theme for vivid";
+      description = ''
+        An attribute set of vivid themes.
+        Each value can either be a path to a theme file or an attribute set
+        defining the theme directly (which will be converted from Nix to YAML).
+      '';
     };
+
   };
 
   config =
@@ -116,7 +133,10 @@ in
         };
       }
       // (lib.mapAttrs' (
-        name: path: lib.nameValuePair "vivid/themes/${name}.yml" { source = path; }
+        name: value:
+        lib.nameValuePair "vivid/themes/${name}.yml" {
+          source = if lib.isAttrs value then yamlFormat.generate "${name}.yml" value else value;
+        }
       ) cfg.themes);
 
       programs.bash.initExtra = mkIf cfg.enableBashIntegration ''
diff --git a/tests/modules/programs/vivid/example-config.nix b/tests/modules/programs/vivid/example-config.nix
index e46f0ab21..dd4c1c13f 100644
--- a/tests/modules/programs/vivid/example-config.nix
+++ b/tests/modules/programs/vivid/example-config.nix
@@ -26,6 +26,7 @@
     themes = {
       ayu = ./themes/ayu.yml;
       mocha = ./themes/mocha.yml;
+      tiny = import ./themes/tiny.nix;
     };
   };
 
@@ -41,5 +42,9 @@
     assertFileExists home-files/.config/vivid/themes/mocha.yml
     assertFileContent home-files/.config/vivid/themes/mocha.yml \
     ${./themes/mocha.yml}
+
+    assertFileExists home-files/.config/vivid/themes/tiny.yml
+    assertFileContent home-files/.config/vivid/themes/tiny.yml \
+    ${./themes/tiny.yml}
   '';
 }
diff --git a/tests/modules/programs/vivid/themes/tiny.nix b/tests/modules/programs/vivid/themes/tiny.nix
new file mode 100644
index 000000000..aee7769ce
--- /dev/null
+++ b/tests/modules/programs/vivid/themes/tiny.nix
@@ -0,0 +1,15 @@
+{
+  colors = {
+    primary = "00aaff";
+    secondary = "ff00aa";
+  };
+  core = {
+    directory = {
+      foreground = "primary";
+    };
+    "executable-file" = {
+      foreground = "secondary";
+      "font-style" = "bold";
+    };
+  };
+}
diff --git a/tests/modules/programs/vivid/themes/tiny.yml b/tests/modules/programs/vivid/themes/tiny.yml
new file mode 100644
index 000000000..c8d435fcb
--- /dev/null
+++ b/tests/modules/programs/vivid/themes/tiny.yml
@@ -0,0 +1,9 @@
+colors:
+  primary: 00aaff
+  secondary: ff00aa
+core:
+  directory:
+    foreground: primary
+  executable-file:
+    font-style: bold
+    foreground: secondary