diff --git a/chart.go b/chart.go
index 9d00254..c3aeeb9 100644
--- a/chart.go
+++ b/chart.go
@@ -463,7 +463,7 @@ func (c Chart) styleDefaultsBackground() Style {
 	return Style{
 		FillColor:   DefaultBackgroundColor,
 		StrokeColor: DefaultBackgroundStrokeColor,
-		StrokeWidth: DefaultStrokeWidth,
+		StrokeWidth: DefaultBackgroundStrokeWidth,
 	}
 }
 
@@ -471,7 +471,7 @@ func (c Chart) styleDefaultsCanvas() Style {
 	return Style{
 		FillColor:   DefaultCanvasColor,
 		StrokeColor: DefaultCanvasStrokeColor,
-		StrokeWidth: DefaultStrokeWidth,
+		StrokeWidth: DefaultCanvasStrokeWidth,
 	}
 }
 
diff --git a/defaults.go b/defaults.go
index 778678d..6255d54 100644
--- a/defaults.go
+++ b/defaults.go
@@ -33,6 +33,11 @@ const (
 	// DefaultTitleTop is the default distance from the top of the chart to put the title.
 	DefaultTitleTop = 10
 
+	// DefaultBackgroundStrokeWidth is the default stroke on the chart background.
+	DefaultBackgroundStrokeWidth = 0.0
+	// DefaultCanvasStrokeWidth is the default stroke on the chart canvas.
+	DefaultCanvasStrokeWidth = 0.0
+
 	// DefaultLineSpacing is the default vertical distance between lines of text.
 	DefaultLineSpacing = 5