<StackLayout VerticalOptions="Center"
                                    x:Name="slpatient"
                                    Grid.Row="4"
                                    BackgroundColor="#8cb8e1"
                                    Orientation="Horizontal">
                            <StackLayout.GestureRecognizers>
                                <TapGestureRecognizer NumberOfTapsRequired="1" Tapped="Button_Clicked" />
                            </StackLayout.GestureRecognizers>
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="10"/>
                                    <ColumnDefinition Width="50"/>
                                    <ColumnDefinition Width="*"/>
                                </Grid.ColumnDefinitions>
                                <Image Source="user_34.png"
                                   Grid.Column="1"
                                   VerticalOptions="Center" />
                                <Label Text="Click me to change the BackgroundColor!"
                                   Grid.Column="2"
                                   TextColor="White"
                                   LineBreakMode="WordWrap"
                                   VerticalOptions="FillAndExpand"
                                   VerticalTextAlignment="Center"/>
                            </Grid>
                        </StackLayout>

private void Button_Clicked_Clicked(object sender, System.EventArgs e)
        {
           slpatient.BackgroundColor = Color.Black;
        }