diff --git a/source/Ox.UI/themes/classic/css/classic.css b/source/Ox.UI/themes/classic/css/classic.css
index a7b6e6f4..53f3f9b8 100644
--- a/source/Ox.UI/themes/classic/css/classic.css
+++ b/source/Ox.UI/themes/classic/css/classic.css
@@ -696,8 +696,13 @@ SyntaxHighlighter
     color: rgb(128, 0, 0);
     font-weight: bold;
 }
+.OxThemeClassic .OxSourceCode .OxError {
+    color: rgb(255, 255, 255);
+    background: rgb(255, 0, 0);
+    font-weight: bold;
+}
 .OxThemeClassic .OxSourceCode .OxIdentifier {
-    color: rgb(0, 0, 0);
+    color: rgb(192, 192, 192);
 }
 .OxThemeClassic .OxSourceCode .OxKeyword {
     color: rgb(0, 0, 128);
@@ -705,8 +710,6 @@ SyntaxHighlighter
 }
 .OxThemeClassic .OxSourceCode .OxLinebreak {
     color: rgb(192, 192, 192);
-    font-weight: normal;
-    font-style: normal;
 }
 .OxThemeClassic .OxSourceCode .OxMethod {
     color: rgb(0, 128, 128);
@@ -739,7 +742,7 @@ SyntaxHighlighter
 }
 .OxThemeClassic .OxSourceCode .OxWhitespace.OxLeading,
 .OxThemeClassic .OxSourceCode .OxWhitespace.OxTrailing {
-    background: rgb(255, 128, 128);
+    background: rgb(255, 255, 0);
 }
 
 /*
diff --git a/source/Ox.UI/themes/modern/css/modern.css b/source/Ox.UI/themes/modern/css/modern.css
index 04722f05..b95201ad 100644
--- a/source/Ox.UI/themes/modern/css/modern.css
+++ b/source/Ox.UI/themes/modern/css/modern.css
@@ -672,53 +672,58 @@ SyntaxHighlighter
     background-color: rgb(32, 32, 32);
     color: rgb(128, 128, 128);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxComment {
+.OxThemeModern .OxSourceCode .OxComment {
     color: rgb(128, 128, 128);
     font-style: italic;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxConstant {
+.OxThemeModern .OxSourceCode .OxConstant {
     color: rgb(192, 64, 64);
     font-weight: bold;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxIdentifier {
+.OxThemeModern .OxSourceCode .OxError {
+    color: rgb(255, 255, 255);
+    background: rgb(255, 0, 0);
+    font-weight: bold;
+}
+.OxThemeModern .OxSourceCode .OxIdentifier {
     color: rgb(192, 192, 192);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxKeyword {
+.OxThemeModern .OxSourceCode .OxKeyword {
     color: rgb(128, 128, 225);
     font-weight: bold;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxLinebreak {
+.OxThemeModern .OxSourceCode .OxLinebreak {
     color: rgb(64, 64, 64);
-    font-weight: normal;
-    font-style: normal;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxMethod {
+.OxThemeModern .OxSourceCode .OxMethod {
     color: rgb(64, 192, 192);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxNumber {
+.OxThemeModern .OxSourceCode .OxNumber {
     color: rgb(192, 64, 64);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxObject {
+.OxThemeModern .OxSourceCode .OxObject {
     color: rgb(64, 192, 192);
     font-weight: bold;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxOperator {
+.OxThemeModern .OxSourceCode .OxOperator {
     color: rgb(128, 128, 255);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxProperty {
+.OxThemeModern .OxSourceCode .OxProperty {
     color: rgb(64, 192, 64);
     font-weight: bold;
 }
-.OxThemeModern .OxSyntaxHighlighter .OxRegexp {
+.OxThemeModern .OxSourceCode .OxRegexp {
     color: rgb(192, 192, 64);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxString {
+.OxThemeModern .OxSourceCode .OxString {
     color: rgb(64, 192, 64);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxWhitespace {
+.OxThemeModern .OxSourceCode .OxWhitespace {
+    color: rgb(64, 64, 64);
 }
-.OxThemeModern .OxSyntaxHighlighter .OxWhitespace.OxTrailing {
-    background: rgb(255, 255, 255);
+.OxThemeModern .OxSourceCode .OxWhitespace.OxLeading,
+.OxThemeModern .OxSourceCode .OxWhitespace.OxTrailing {
+    background: rgb(255, 255, 0);
 }
 
 /*