diff --git a/include/lrglobal.cpp b/include/lrglobal.cpp
index b4eb854..55ab31b 100644
--- a/include/lrglobal.cpp
+++ b/include/lrglobal.cpp
@@ -76,4 +76,13 @@ QVector<QString> normalizeCaptures(const QRegExp& reg){
     return result;
 }
 
+bool isColorDark(QColor color){
+    qreal darkness = 1-(0.299*color.red() + 0.587*color.green() + 0.114*color.blue())/255;
+    if(darkness<0.5){
+        return false;
+    } else {
+        return true;
+    }
+}
+
 } //namespace LimeReport
diff --git a/include/lrglobal.h b/include/lrglobal.h
index 4ddad30..fdc35d4 100644
--- a/include/lrglobal.h
+++ b/include/lrglobal.h
@@ -101,6 +101,7 @@ namespace Const{
     QString escapeSimbols(const QString& value);
     QString replaceHTMLSymbols(const QString &value);
     QVector<QString> normalizeCaptures(const QRegExp &reg);
+    bool isColorDark(QColor color);
 
     enum ExpandType {EscapeSymbols, NoEscapeSymbols, ReplaceHTMLSymbols};
     enum RenderPass {FirstPass = 1, SecondPass = 2};
diff --git a/limereport/lrglobal.cpp b/limereport/lrglobal.cpp
index b4eb854..55ab31b 100644
--- a/limereport/lrglobal.cpp
+++ b/limereport/lrglobal.cpp
@@ -76,4 +76,13 @@ QVector<QString> normalizeCaptures(const QRegExp& reg){
     return result;
 }
 
+bool isColorDark(QColor color){
+    qreal darkness = 1-(0.299*color.red() + 0.587*color.green() + 0.114*color.blue())/255;
+    if(darkness<0.5){
+        return false;
+    } else {
+        return true;
+    }
+}
+
 } //namespace LimeReport
diff --git a/limereport/lrglobal.h b/limereport/lrglobal.h
index 4ddad30..fdc35d4 100644
--- a/limereport/lrglobal.h
+++ b/limereport/lrglobal.h
@@ -101,6 +101,7 @@ namespace Const{
     QString escapeSimbols(const QString& value);
     QString replaceHTMLSymbols(const QString &value);
     QVector<QString> normalizeCaptures(const QRegExp &reg);
+    bool isColorDark(QColor color);
 
     enum ExpandType {EscapeSymbols, NoEscapeSymbols, ReplaceHTMLSymbols};
     enum RenderPass {FirstPass = 1, SecondPass = 2};