diff --git a/RegExpSupport/src/org/intellij/lang/regexp/RegExpHighlighter.java b/RegExpSupport/src/org/intellij/lang/regexp/RegExpHighlighter.java
index e1dd0411907f..4b5e3a0d8b6b 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/RegExpHighlighter.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/RegExpHighlighter.java
@@ -44,7 +44,7 @@ public class RegExpHighlighter extends SyntaxHighlighterBase {
   static final TextAttributesKey BRACES = createTextAttributesKey("REGEXP.BRACES", DefaultLanguageHighlighterColors.BRACES);
   static final TextAttributesKey BRACKETS = createTextAttributesKey("REGEXP.BRACKETS", DefaultLanguageHighlighterColors.BRACKETS);
   static final TextAttributesKey COMMA = createTextAttributesKey("REGEXP.COMMA", DefaultLanguageHighlighterColors.COMMA);
-  static final TextAttributesKey ESC_CHARACTER = createTextAttributesKey("REGEXP.ESC_CHARACTER", DefaultLanguageHighlighterColors.VALID_STRING_ESCAPE);
+  public static final TextAttributesKey ESC_CHARACTER = createTextAttributesKey("REGEXP.ESC_CHARACTER", DefaultLanguageHighlighterColors.VALID_STRING_ESCAPE);
   static final TextAttributesKey CHAR_CLASS = createTextAttributesKey("REGEXP.CHAR_CLASS", DefaultLanguageHighlighterColors.MARKUP_ENTITY);
   static final TextAttributesKey QUOTE_CHARACTER = createTextAttributesKey("REGEXP.QUOTE_CHARACTER", DefaultLanguageHighlighterColors.VALID_STRING_ESCAPE);
   static final TextAttributesKey COMMENT = createTextAttributesKey("REGEXP.COMMENT", DefaultLanguageHighlighterColors.LINE_COMMENT);
diff --git a/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java b/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
index d8b47e9c81b4..bc61484b2d90 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
@@ -157,8 +157,16 @@ public final class RegExpAnnotator extends RegExpElementVisitor implements Annot
   public void visitRegExpChar(final RegExpChar ch) {
     final PsiElement child = ch.getFirstChild();
     final IElementType type = child.getNode().getElementType();
-    if (type == StringEscapesTokenTypes.INVALID_CHARACTER_ESCAPE_TOKEN) {
-      myHolder.newAnnotation(HighlightSeverity.ERROR, "Illegal/unsupported escape sequence").create();
+    if (type == RegExpTT.CHARACTER) {
+      if (ch.getTextLength() > 1) {
+        myHolder.newSilentAnnotation(HighlightInfoType.SYMBOL_TYPE_SEVERITY)
+          .range(ch)
+          .textAttributes(RegExpHighlighter.ESC_CHARACTER)
+          .create();
+      }
+    }
+    else if (type == StringEscapesTokenTypes.INVALID_CHARACTER_ESCAPE_TOKEN) {
+      myHolder.newAnnotation(HighlightSeverity.ERROR, RegExpBundle.message("error.illegal.unsupported.escape.sequence")).create();
       return;
     }
     else if (type == RegExpTT.BAD_HEX_VALUE) {