diff --git a/hutool-core/src/main/java/cn/hutool/core/lang/ansi/AnsiColorWrapper.java b/hutool-core/src/main/java/cn/hutool/core/lang/ansi/AnsiColorWrapper.java
index b926c29ff..a9b8f19a3 100644
--- a/hutool-core/src/main/java/cn/hutool/core/lang/ansi/AnsiColorWrapper.java
+++ b/hutool-core/src/main/java/cn/hutool/core/lang/ansi/AnsiColorWrapper.java
@@ -52,7 +52,7 @@ public class AnsiColorWrapper {
 					return item;
 				}
 			}
-			throw new IllegalArgumentException(StrUtil.format("No matched Background instance,code=",code));
+			throw new IllegalArgumentException(StrUtil.format("No matched Background instance,code={}",code));
 		}
 		if (foreOrBack == ForeOrBack.FORE){
 			return Ansi8BitColor.foreground(code);