<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <SolidColorBrush x:Key="GridSplitterBackground" Opacity="0.4" Color="#F9F9F9" />
    <SolidColorBrush x:Key="GridSplitterPreviewBackground" Color="#0A4694" />
</ResourceDictionary>