diff --git a/src/nodes/QskVertex.h b/src/nodes/QskVertex.h
index 5937ffa9..f1874bbd 100644
--- a/src/nodes/QskVertex.h
+++ b/src/nodes/QskVertex.h
@@ -16,18 +16,18 @@ namespace QskVertex
     class QSK_EXPORT Color
     {
       public:
-        constexpr Color();
+        constexpr Color() noexcept;
 
         constexpr Color( unsigned char red, unsigned char green,
-            unsigned char blue, unsigned char alpha );
+            unsigned char blue, unsigned char alpha ) noexcept;
 
-        Color( QRgb );
+        Color( QRgb ) noexcept;
         Color( const QColor& );
 
-        Color interpolatedTo( Color, double ratio ) const;
+        Color interpolatedTo( Color, double ratio ) const noexcept;
 
-        bool operator==( const Color& ) const;
-        bool operator!=( const Color& ) const;
+        constexpr bool operator==( const Color& ) const noexcept;
+        constexpr bool operator!=( const Color& ) const noexcept;
 
         unsigned char r, g, b, a;
     };
@@ -35,23 +35,23 @@ namespace QskVertex
     class QSK_EXPORT Line
     {
       public:
-        inline void setLine( float x1, float y1, float x2, float y2 )
+        inline void setLine( float x1, float y1, float x2, float y2 ) noexcept
         {
             p1.set( x1, y1 );
             p2.set( x2, y2 );
         }
 
-        inline void setHLine( float x1, float x2, float y )
+        inline void setHLine( float x1, float x2, float y ) noexcept
         {
             setLine( x1, y, x2, y );
         }
 
-        inline void setVLine( float x, float y1, float y2 )
+        inline void setVLine( float x, float y1, float y2 ) noexcept
         {
             setLine( x, y1, x, y2 );
         }
 
-        inline void setLine( float x1, float y1, float x2, float y2, Color )
+        inline void setLine( float x1, float y1, float x2, float y2, Color ) noexcept
         {
             /* The color parameter makes no sense, but is useful
                when being using from templated code
@@ -67,23 +67,23 @@ namespace QskVertex
     {
       public:
         inline void setLine( float x1, float y1, Color c1,
-            float x2, float y2, Color c2 )
+            float x2, float y2, Color c2 ) noexcept
         {
             p1.set( x1, y1, c1.r, c1.g, c1.b, c1.a );
             p2.set( x2, y2, c2.r, c2.g, c2.b, c2.a );
         }
 
-        inline void setLine( float x1, float y1, float x2, float y2, Color color )
+        inline void setLine( float x1, float y1, float x2, float y2, Color color ) noexcept
         {
             setLine( x1, y1, color, x2, y2, color );
         }
 
-        inline void setHLine( qreal x1, qreal x2, qreal y, Color color )
+        inline void setHLine( qreal x1, qreal x2, qreal y, Color color ) noexcept
         {
             setLine( x1, y, color, x2, y, color );
         }
 
-        inline void setVLine( qreal x, qreal y1, qreal y2, Color color )
+        inline void setVLine( qreal x, qreal y1, qreal y2, Color color ) noexcept
         {
             setLine( x, y1, color, x, y2, color );
         }
@@ -101,7 +101,7 @@ namespace QskVertex
 
     void QSK_EXPORT debugGeometry( const QSGGeometry& );
 
-    inline constexpr Color::Color()
+    inline constexpr Color::Color() noexcept
         : r( 0 )
         , g( 0 )
         , b( 0 )
@@ -110,7 +110,7 @@ namespace QskVertex
     }
 
     inline constexpr Color::Color( unsigned char red, unsigned char green,
-            unsigned char blue, unsigned char alpha )
+            unsigned char blue, unsigned char alpha ) noexcept
         : r( red )
         , g( green )
         , b( blue )
@@ -118,7 +118,7 @@ namespace QskVertex
     {
     }
 
-    inline Color::Color( QRgb rgb )
+    inline Color::Color( QRgb rgb ) noexcept
     {
         r = qRed( rgb );
         g = qGreen( rgb );
@@ -140,7 +140,7 @@ namespace QskVertex
     {
     }
 
-    inline Color Color::interpolatedTo( Color colorTo, double ratio ) const
+    inline Color Color::interpolatedTo( Color colorTo, double ratio ) const noexcept
     {
         if ( ratio <= 0.0 )
             return *this;
@@ -155,19 +155,20 @@ namespace QskVertex
             rt * b + t * colorTo.b, rt * a + t * colorTo.a );
     }
 
-    inline bool Color::operator==( const Color& other ) const
+    inline constexpr bool Color::operator==( const Color& other ) const noexcept
     {
         return ( r == other.r ) && ( g == other.g )
                && ( b == other.b ) && ( a == other.a );
     }
 
-    inline bool Color::operator!=( const Color& other ) const
+    inline constexpr bool Color::operator!=( const Color& other ) const noexcept
     {
         return !( *this == other );
     }
 }
 
 #ifndef QT_NO_DEBUG_STREAM
+class QDebug;
 QDebug operator<<( QDebug debug, QskVertex::Color );
 QDebug operator<<( QDebug debug, QskVertex::ColoredLine );
 QDebug operator<<( QDebug debug, QskVertex::Line );