[ivette] Dark dead code highlight in dark mode

ivette/src/colors/dark.css

@@ -10,8 +10,8 @@
     --code-hover: #005137;
     --code-select: #4f3d24;
     --code-select-hover: #5f4d34;
-    --dead-code: #666;
-    --non-terminating: #666;
+    --dead-code: #444;
+    --non-terminating: #444;
     --highlighted-marker: #778822;
     --code-bullet: #0a2234;