Semi.Avalonia/src/Semi.Avalonia/Themes/Dark/ToggleButton.axaml

<ResourceDictionary
    xmlns="https://github.com/avaloniaui"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sys="clr-namespace:System;assembly=System.Runtime">

    <sys:Double x:Key="ToggleButtonDefaultFontSize">14</sys:Double>
    <FontWeight x:Key="ToggleButtonDefaultFontWeight">600</FontWeight>

    <Thickness x:Key="ToggleButtonDefaultPadding">12 6</Thickness>
    <Thickness x:Key="ToggleButtonLargePadding">16 10</Thickness>
    <Thickness x:Key="ToggleButtonSmallPadding">6 2</Thickness>
    <Thickness x:Key="ToggleButtonBorderThickness">1</Thickness>
    <CornerRadius x:Key="ToggleButtonCornerRadius">3</CornerRadius>

    <SolidColorBrush x:Key="ToggleButtonDefaultBackground" Opacity="0.12" Color="White" />
    <SolidColorBrush x:Key="ToggleButtonDefaultPointeroverBackground" Opacity="0.16" Color="White" />
    <SolidColorBrush x:Key="ToggleButtonDefaultPressedBackground" Opacity="0.20" Color="White" />
    <SolidColorBrush x:Key="ToggleButtonDefaultDisabledBackground" Opacity="0.12" Color="White" />

    <SolidColorBrush x:Key="ToggleButtonDefaultBorderBrush" Color="Transparent" />

    <SolidColorBrush x:Key="ToggleButtonDefaultPrimaryForeground" Color="#54A9FF" />
    <SolidColorBrush x:Key="ToggleButtonDefaultSecondaryForeground" Color="#40B4F3" />
    <SolidColorBrush x:Key="ToggleButtonDefaultTertiaryForeground" Color="#888D92" />
    <SolidColorBrush x:Key="ToggleButtonDefaultWarningForeground" Color="#FFAE43" />
    <SolidColorBrush x:Key="ToggleButtonDefaultErrorForeground" Color="#FC725A" />
    <SolidColorBrush x:Key="ToggleButtonDefaultDisabledForeground" Color="#2E3238" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryCheckedBackground" Color="#54A9FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryCheckedBackground" Color="#40B4F3" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryCheckedBackground" Color="#888D92" />
    <SolidColorBrush x:Key="ToggleButtonWarningCheckedBackground" Color="#FFAE43" />
    <SolidColorBrush x:Key="ToggleButtonErrorCheckedBackground" Color="#FC725A" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryCheckedPointeroverBackground" Color="#7FC1FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryCheckedPointeroverBackground" Color="#6EC8F6" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryCheckedPointeroverBackground" Color="#A7ABB0" />
    <SolidColorBrush x:Key="ToggleButtonWarningCheckedPointeroverBackground" Color="#FFC772" />
    <SolidColorBrush x:Key="ToggleButtonErrorCheckedPointeroverBackground" Color="#FD9983" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryCheckedPressedBackground" Color="#A9D7FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryCheckedPressedBackground" Color="#9DDCF9" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryCheckedPressedBackground" Color="#C6CACD" />
    <SolidColorBrush x:Key="ToggleButtonWarningCheckedPressedBackground" Color="#FFDDA1" />
    <SolidColorBrush x:Key="ToggleButtonErrorCheckedPressedBackground" Color="#FDBEAC" />

    <SolidColorBrush x:Key="ToggleButtonCheckedForeground" Color="Black" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryIndeterminateBackground" Color="#053170" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryIndeterminateBackground" Color="#003761" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryIndeterminateBackground" Color="#1C1F23" />
    <SolidColorBrush x:Key="ToggleButtonWarningIndeterminateBackground" Color="#551F03" />
    <SolidColorBrush x:Key="ToggleButtonErrorIndeterminateBackground" Color="#6C090B" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryIndeterminateBorderBrush" Color="#54A9FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryIndeterminateBorderBrush" Color="#40B4F3" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryIndeterminateBorderBrush" Color="#888D92" />
    <SolidColorBrush x:Key="ToggleButtonWarningIndeterminateBorderBrush" Color="#FFAE43" />
    <SolidColorBrush x:Key="ToggleButtonErrorIndeterminateBorderBrush" Color="#FC725A" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryIndeterminatePointeroverBorderBrush" Color="#7FC1FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryIndeterminatePointeroverBorderBrush" Color="#6EC8F6" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryIndeterminatePointeroverBorderBrush" Color="#A7ABB0" />
    <SolidColorBrush x:Key="ToggleButtonWarningIndeterminatePointeroverBorderBrush" Color="#FFC772" />
    <SolidColorBrush x:Key="ToggleButtonErrorIndeterminatePointeroverBorderBrush" Color="#FD9983" />

    <SolidColorBrush x:Key="ToggleButtonPrimaryIndeterminatePressedBorderBrush" Color="#A9D7FF" />
    <SolidColorBrush x:Key="ToggleButtonSecondaryIndeterminatePressedBorderBrush" Color="#9DDCF9" />
    <SolidColorBrush x:Key="ToggleButtonTertiaryIndeterminatePressedBorderBrush" Color="#C6CACD" />
    <SolidColorBrush x:Key="ToggleButtonWarningIndeterminatePressedBorderBrush" Color="#FFDDA1" />
    <SolidColorBrush x:Key="ToggleButtonErrorIndeterminatePressedBorderBrush" Color="#FDBEAC" />
</ResourceDictionary>