diff --git a/libs/widgets/qcodeedit.cpp b/libs/widgets/qcodeedit.cpp
index 64d5035..e23cd48 100644
--- a/libs/widgets/qcodeedit.cpp
+++ b/libs/widgets/qcodeedit.cpp
@@ -877,18 +877,32 @@ void QCodeEdit::highlightBrackets() {
 }
 
 
+QColor inverseColorValue(const QColor & c) {
+	int hsv[4];
+	c.getHsv(&hsv[0], &hsv[1], &hsv[2], &hsv[3]);
+	return QColor::fromHsv(hsv[0], hsv[1], 255 - hsv[2], hsv[3]);
+}
+QBrush QCodeEdit::invertedBrush(const QBrush & b) {
+	auto ret = b;
+	ret.setColor(inverseColorValue(b.color()));
+	return ret;
+}
+
+
+QTextCharFormat QCodeEdit::invertedFormat(const QTextCharFormat & f) {
+	auto ret = f;
+	ret.setForeground(invertedBrush(ret.foreground()));
+	ret.setBackground(invertedBrush(ret.background()));
+	return ret;
+}
+
+
 void QCodeEdit::applyExtraSelection() {
-	auto inverseColorValue = [](const QColor & c) {
-		int hsv[4];
-		c.getHsv(&hsv[0], &hsv[1], &hsv[2], &hsv[3]);
-		return QColor::fromHsv(hsv[0], hsv[1], 255 - hsv[2], hsv[3]);
-	};
 	QList<QTextEdit::ExtraSelection> esl;
 	esl << es_line << es_selected << es_custom << es_brackets << es_search_list << es_cursor << es_link;
 	if (is_dark_theme) {
 		for (auto & e: esl) {
-			e.format.foreground().setColor(inverseColorValue(e.format.foreground().color()));
-			e.format.background().setColor(inverseColorValue(e.format.background().color()));
+			e.format = invertedFormat(e.format);
 		}
 	}
 	esl << es_blockselection;
diff --git a/libs/widgets/qcodeedit.h b/libs/widgets/qcodeedit.h
index 7caa9aa..1946bbc 100644
--- a/libs/widgets/qcodeedit.h
+++ b/libs/widgets/qcodeedit.h
@@ -111,6 +111,9 @@ public:
 	void registerAutoCompletitionClass(int id, ACClassType ac_class, const QString & name, const QIcon & icon = QIcon());
 	bool wordCompletitionEnabled() const { return word_complete; }
 
+	static QBrush invertedBrush(const QBrush & b);
+	static QTextCharFormat invertedFormat(const QTextCharFormat & f);
+
 protected:
 	typedef QPair<QString, QString> StringsPair;
 	typedef QPair<int, QList<ACEntry>> ACSection; // section, ACClass.id -> list of entries