diff --git a/internal_packages/ui-dark/package.json b/internal_packages/ui-dark/package.json
index 43a79762c..ca145587c 100644
--- a/internal_packages/ui-dark/package.json
+++ b/internal_packages/ui-dark/package.json
@@ -5,6 +5,7 @@
   "version": "0.1.0",
   "description": "The Dark N1 Client Theme",
   "license": "GPL-3.0",
+  "styleSheets": ["email-frame"],
   "engines": {
     "nylas": "*"
   },
diff --git a/internal_packages/ui-dark/styles/email-frame.less b/internal_packages/ui-dark/styles/email-frame.less
new file mode 100644
index 000000000..a3bffa0ee
--- /dev/null
+++ b/internal_packages/ui-dark/styles/email-frame.less
@@ -0,0 +1,9 @@
+.ignore-in-parent-frame {
+  body {
+    -webkit-filter: invert() hue-rotate(180deg);
+    color: #111;
+  }
+  img {
+    -webkit-filter: invert() hue-rotate(180deg);
+  }
+}