diff --git a/base/include/string_ex.h b/base/include/string_ex.h
index cf99110c3561048b2eec33507de2a2b1e8fa6196..f5eb23bc11d513657fe1fea90d79943bd2a152c2 100644
--- a/base/include/string_ex.h
+++ b/base/include/string_ex.h
@@ -224,6 +224,16 @@ bool IsSameTextStr(const std::string& first, const std::string& second);
  */
 bool IsAsciiString(const std::string& str);
 
+/**
+ * @ingroup StringOperation
+ * @brief Checks whether all characters in a string represent valid HEX number.
+ *
+ * @param str Indicates the base string.
+ * @return Returns `true` if all characters in the string represent valid HEX number;
+ * returns `false` otherwise.
+ */
+bool IsValidHexString(const std::string& colorStr);
+
 #ifndef IOS_PLATFORM
 /**
  * @ingroup StringOperation
diff --git a/base/src/string_ex.cpp b/base/src/string_ex.cpp
index 0082ff75420c97f1c88826a7a6052247e1a4bd9e..ec8c1a475c08b23a1ae489f1c47191742d18e8f7 100644
--- a/base/src/string_ex.cpp
+++ b/base/src/string_ex.cpp
@@ -251,6 +251,20 @@ bool IsAsciiString(const string& str)
     return true;
 }
 
+bool IsValidHexString(const std::string& str)
+{
+    if (str.empty()) {
+        return false;
+    }
+    for (char ch : str) {
+        if ((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')) {
+            continue;
+        }
+        return false;
+    }
+    return true;
+}
+
 #ifndef IOS_PLATFORM
 u16string Str8ToStr16(const string& str)
 {