diff --git a/WordsIDE/chainhightlighter.cpp b/WordsIDE/chainhightlighter.cpp
index 2690141..35eb869 100644
--- a/WordsIDE/chainhightlighter.cpp
+++ b/WordsIDE/chainhightlighter.cpp
@@ -1,6 +1,7 @@
 #include "chainhightlighter.h"
 #include <QDebug>
 
+using namespace Parse;
 using namespace Enhancement;
 
 ChainHightlighter::ChainHightlighter(QObject *parent)
@@ -20,17 +21,25 @@ void ChainHightlighter::highlightBlock(const QString &text)
         return;
 
     QTextCharFormat unknowns;
-    unknowns.setForeground(QBrush(Qt::red));
+    unknowns.setForeground(QBrush(Qt::gray));
 
     QTextCharFormat generate;
-    generate.setForeground(QBrush(Qt::blue));
+    generate.setForeground(QBrush(Qt::black));
+
+    QTextCharFormat error;
+    error.setForeground(QBrush(Qt::red));
 
     auto block = currentBlock();
     auto words = parse_core->getWords(block.blockNumber());
     for(auto &w : words){
+        QList<ErrorMessage> xerrors;
+
         if(w->host() == parse_core->unknowns()){
             setFormat(w->column()-1, w->toString().length(), unknowns);
         }
+        else if(!w->host()->check(xerrors)){
+            setFormat(w->column()-1, w->toString().length(), error);
+        }
         else{
             setFormat(w->column()-1, w->toString().length(), generate);
         }