diff --git a/colorpicker.go b/colorpicker.go
index 7fc0206..0f5d3ed 100644
--- a/colorpicker.go
+++ b/colorpicker.go
@@ -64,7 +64,7 @@ func (this *HSVAColorPicker) SetValue (value color.Color) {
 	if value == nil { value = color.Transparent }
 	this.value = internal.HSVAModel.Convert(value).(internal.HSVA)
 	this.hueSlider.SetValue(this.value.H)
-	this.alphaSlider.SetValue(float64(this.value.A) / 255)
+	this.alphaSlider.SetValue(float64(this.value.A) / 0xFFFF)
 }
 
 // OnValueChange specifies a function to be called when the user changes the
diff --git a/swatch.go b/swatch.go
index 66bc4e1..3cde31e 100644
--- a/swatch.go
+++ b/swatch.go
@@ -91,7 +91,7 @@ func (this *Swatch) Choose () {
 	
 	committed := false
 	
-	colorPicker := NewColorPicker(this.Value())
+	colorPicker := NewHSVAColorPicker(this.Value())
 	colorPicker.OnValueChange(func () {
 		this.userSetValue(colorPicker.Value())
 	})