diff --git a/README.md b/README.md
index 16cc81e..ecb3147 100644
--- a/README.md
+++ b/README.md
@@ -376,7 +376,7 @@ vscode应用商店中搜索"**any-rule**".
 
 ### 16进制颜色
 ```javascript
-/^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3}|[a-fA-F0-9]{8})$/
+/^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3}|[a-fA-F0-9]{8}|[a-fA-F0-9]{4})$/
 ```
 
 ### 微信号(wx)，6至20位，以字母开头，字母，数字，减号，下划线