Artemis/src/Artemis.UI/Screens/Workshop/WorkshopView.xaml

<UserControl x:Class="Artemis.UI.Screens.Workshop.WorkshopView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:Artemis.UI.Screens.Workshop"
             xmlns:s="https://github.com/canton7/Stylet"
             xmlns:controls="clr-namespace:Artemis.UI.Shared;assembly=Artemis.UI.Shared"
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
             mc:Ignorable="d"
             d:DesignHeight="450" d:DesignWidth="800">

    <StackPanel>
        <Rectangle Width="100" Height="100" HorizontalAlignment="Left">
            <Rectangle.Fill>
                <SolidColorBrush Color="{Binding TestColor}" />
            </Rectangle.Fill>
        </Rectangle>
        <TextBlock Text="{Binding TestColor}" />
        <Button Command="{s:Action UpdateValues}" Style="{StaticResource MaterialDesignRaisedButton}"
                HorizontalAlignment="Left" Margin="0 10">
            Update values
        </Button>
        <CheckBox IsChecked="{Binding TestPopupOpen}">Test</CheckBox>
        <controls:ColorPicker Color="{Binding TestColor, Mode=TwoWay}" PopupOpen="{Binding TestPopupOpen}" materialDesign:HintAssist.Hint="Custom hint" />
    </StackPanel>


</UserControl>