FloatingActionButtonView.cs

public class FloatingActionButtonView : View
{
    public static readonly BindableProperty ImageNameProperty = BindableProperty.Create<FloatingActionButtonView,string>( p => p.ImageName, string.Empty);
    public string ImageName 
    {
      get { return (string)GetValue (ImageNameProperty); } 
      set { SetValue (ImageNameProperty, value); } 
    }
  
    public static readonly BindableProperty ColorNormalProperty = BindableProperty.Create<FloatingActionButtonView,Color>( p => p.ColorNormal, Color.White);
    public Color ColorNormal 
    {
      get { return (Color)GetValue (ColorNormalProperty); } 
      set { SetValue (ColorNormalProperty, value); } 
    }

    public static readonly BindableProperty ColorPressedProperty = BindableProperty.Create<FloatingActionButtonView,Color>( p => p.ColorPressed, Color.White);
    public Color ColorPressed 
    {
      get { return (Color)GetValue (ColorPressedProperty); } 
      set { SetValue (ColorPressedProperty, value); } 
    }

    public static readonly BindableProperty ColorRippleProperty = BindableProperty.Create<FloatingActionButtonView,Color>( p => p.ColorRipple, Color.White);
    public Color ColorRipple 
    {
      get { return (Color)GetValue (ColorRippleProperty); } 
      set { SetValue (ColorRippleProperty, value); } 
    }
    ...
}