CulAvalonia/Culusas/App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="Culusas.App"
             xmlns:local="using:Culusas"
             RequestedThemeVariant="Default">
             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->

    <Application.DataTemplates>
        <local:ViewLocator/>
    </Application.DataTemplates>
  
    <Application.Styles>
		<FluentTheme>
			<FluentTheme.Palettes>
				<ColorPaletteResources x:Key="Light" Accent="#ff8961cc" AltHigh="White" AltLow="White" AltMedium="White" AltMediumHigh="White" AltMediumLow="White" BaseHigh="Black" BaseLow="#ffeeceff" BaseMedium="#ffa987bc" BaseMediumHigh="#ff7b5890" BaseMediumLow="#ff9270a6" ChromeAltLow="#ff7b5890" ChromeBlackHigh="Black" ChromeBlackLow="#ffeeceff" ChromeBlackMedium="#ff7b5890" ChromeBlackMediumLow="#ffa987bc" ChromeDisabledHigh="#ffeeceff" ChromeDisabledLow="#ffa987bc" ChromeGray="#ff9270a6" ChromeHigh="#ffeeceff" ChromeLow="#fffeeaff" ChromeMedium="#fffbe4ff" ChromeMediumLow="#fffeeaff" ChromeWhite="White" ListLow="#fffbe4ff" ListMedium="#ffeeceff" RegionColor="#fffef6ff" />
				<ColorPaletteResources x:Key="Dark" Accent="#ff8961cc" AltHigh="Black" AltLow="Black" AltMedium="Black" AltMediumHigh="Black" AltMediumLow="Black" BaseHigh="White" BaseLow="#ff64576b" BaseMedium="#ffb6aabc" BaseMediumHigh="#ffcbbfd0" BaseMediumLow="#ff8d8193" ChromeAltLow="#ffcbbfd0" ChromeBlackHigh="Black" ChromeBlackLow="#ffcbbfd0" ChromeBlackMedium="Black" ChromeBlackMediumLow="Black" ChromeDisabledHigh="#ff64576b" ChromeDisabledLow="#ffb6aabc" ChromeGray="#ffa295a8" ChromeHigh="#ffa295a8" ChromeLow="#ff332041" ChromeMedium="#ff3f2e4b" ChromeMediumLow="#ff584960" ChromeWhite="White" ListLow="#ff3f2e4b" ListMedium="#ff64576b" RegionColor="#ff262738" />
			</FluentTheme.Palettes>
		</FluentTheme>

	</Application.Styles>
</Application>