Update README.md

2025-07-14 07:38:58 +08:00 · 2022-11-25 14:14:43 +08:00 · 2022-11-25 14:14:43 +08:00 · 0c5bb2c90d
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@ -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