diff --git a/docs/style_guide.md b/docs/style_guide.md
index 8c27a8c..20d6b5d 100644
--- a/docs/style_guide.md
+++ b/docs/style_guide.md
@@ -132,6 +132,8 @@
     qualified with the file name (just `:foo`).
   * Other deps should always use fully-qualified path names unless
     relative ones are required for some reason.
+  * Prefer to omit the colon and name when possible. See the [GN implicit
+    names](reference.md#implicit-names).
 
 ```
   deps = [