diff --git a/colorpicker.go b/colorpicker.go
index 80cd9c0..084be29 100644
--- a/colorpicker.go
+++ b/colorpicker.go
@@ -44,7 +44,7 @@ func NewColorPicker (value color.Color) *ColorPicker {
 	picker.alphaSlider = NewVerticalSlider(0.0)
 	picker.Add(picker.alphaSlider)
 	picker.alphaSlider.OnValueChange(func () {
-		picker.value.A = uint8(picker.alphaSlider.Value() * 255)
+		picker.value.A = uint16(picker.alphaSlider.Value() * 0xFFFF)
 		picker.on.valueChange.Broadcast()
 		picker.pickerMap.Invalidate()
 	})
@@ -62,7 +62,7 @@ func (this *ColorPicker) Value () color.Color {
 // SetValue sets the color of the picker.
 func (this *ColorPicker) SetValue (value color.Color) {
 	if value == nil { value = color.Transparent }
-	this.value = internal.RGBAToHSVA(value.RGBA())
+	this.value = internal.HSVAModel.Convert(value).(internal.HSVA)
 	this.hueSlider.SetValue(this.value.H)
 	this.alphaSlider.SetValue(float64(this.value.A) / 255)
 }
@@ -137,7 +137,7 @@ func (this *colorPickerMap) Draw (can canvas.Canvas) {
 			H: this.parent.value.H,
 			S:     float64(xx) / float64(bounds.Dx()),
 			V: 1 - float64(yy) / float64(bounds.Dy()),
-			A: 255,
+			A: 0xFFFF,
 		}
 		
 		sPos := int(     this.parent.value.S  * float64(bounds.Dx()))