diff --git a/static/themes/_list.json b/static/themes/_list.json
index b063729da..b8190e816 100644
--- a/static/themes/_list.json
+++ b/static/themes/_list.json
@@ -583,5 +583,10 @@
     "name": "witch_girl",
     "bgColor": "#f3dbda",
     "textColor": "#56786a"
+  },
+  {
+    "name": "terror_below",
+    "bgColor": "#0b1e1a",
+    "textColor": "#66ac92"
   }
 ]
diff --git a/static/themes/terror_below.css b/static/themes/terror_below.css
new file mode 100644
index 000000000..f6275f3a0
--- /dev/null
+++ b/static/themes/terror_below.css
@@ -0,0 +1,11 @@
+:root {
+  --bg-color: #0b1e1a;
+  --caret-color: #66ac92;
+  --main-color: #66ac92;
+  --sub-color: #015c53;
+  --text-color: #dceae5;
+  --error-color: #bf616a;
+  --error-extra-color: #793e44;
+  --colorful-error-color: #bf616a;
+  --colorful-error-extra-color: #793e44;
+}