diff --git a/cypress/e2e/seo.cy.js b/cypress/e2e/seo.cy.js
index cec441b..54da609 100644
--- a/cypress/e2e/seo.cy.js
+++ b/cypress/e2e/seo.cy.js
@@ -368,6 +368,14 @@ describe("Extended tags", () => {
       "Agent"
     );
   });
+
+  it("sets the media attribute when included", () => {
+    cy.get('head meta[name="theme-color"]').should(
+      "have.attr",
+      "media",
+      "(prefers-color-scheme: dark)"
+    );
+  });
 });
 
 describe("Extended link tags", () => {
diff --git a/src/pages/extendedTags.astro b/src/pages/extendedTags.astro
index 29f8853..f940668 100644
--- a/src/pages/extendedTags.astro
+++ b/src/pages/extendedTags.astro
@@ -20,6 +20,7 @@ import SEO from "../SEO.astro";
           },
           { name: "twitter:title", content: "Tinker Tailor Soldier Spy" },
           { name: "twitter:description", content: "Agent" },
+          { name: "theme-color", media: "(prefers-color-scheme: dark)", content: "theme_color_dark" }
         ],
       }}
     />