diff --git a/nemu/src/monitor/sdb/sdb.c b/nemu/src/monitor/sdb/sdb.c
index 3c08795..01ad056 100644
--- a/nemu/src/monitor/sdb/sdb.c
+++ b/nemu/src/monitor/sdb/sdb.c
@@ -73,7 +73,7 @@ static char *rl_gets() {
     line_read = NULL;
   }
 
-  line_read = readline("(nemu) ");
+  line_read = readline("(\e[1;34mnemu\e[0m) ");
 
   if (line_read && *line_read) {
     add_history(line_read);