Maple/Maple.App/App.xaml

<Application
    x:Class="Maple_App.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Maple_App"
    xmlns:controls="using:Microsoft.UI.Xaml.Controls">
    <Application.Resources>
        <controls:XamlControlsResources>
            <controls:XamlControlsResources.MergedDictionaries>
                <ResourceDictionary>
                    <Color x:Key="SystemAccentColor">#2fc751</Color>
                    <Color x:Key="SystemAccentColorLight1">#33cf5a</Color>
                    <Color x:Key="SystemAccentColorLight2">#5fda87</Color>
                    <Color x:Key="SystemAccentColorLight3">#8ed7bd</Color>
                    <Color x:Key="SystemAccentColorDark1">#219349</Color>
                    <Color x:Key="SystemAccentColorDark2">#135f3b</Color>
                    <Color x:Key="SystemAccentColorDark3">#0c4432</Color>
                </ResourceDictionary>
            </controls:XamlControlsResources.MergedDictionaries>
        </controls:XamlControlsResources>

        <!--<Color x:Key="SystemAccentColor">#2ebe5a </Color>-->
    </Application.Resources>
</Application>