<Button
    x:Class="Qwilight.View.ColorInput"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"   
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Style="{StaticResource StandardInput}"
    BorderBrush="{Binding PaintValue}"
    DataContext="{Binding RelativeSource={RelativeSource Self}}"
    Foreground="White" />