RadCheckBox CheckedSymbolColor doesn't reflect the value on Windows. The default value is displayed instead.
Workaround:
1. Go to App.xaml file inside the Platforms/Windows folder xmlns:telerikCheckbox="using:Telerik.Maui.Controls.Compatibility.PrimitivesRenderer.UWP">
<Style TargetType="telerikCheckbox:ExtendedCheckBox">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="Foreground" Value="{ThemeResource SystemBaseHighColor}"/>
<Setter Property="Padding" Value="8,5,0,0"/>
<Setter Property="HorizontalAlignment" Value="Left"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}"/>
<Setter Property="MinWidth" Value="18"/>
<Setter Property="MinHeight" Value="18"/>
<Setter Property="UseSystemFocusVisuals" Value="True"/>
<Setter Property="UncheckedColor" Value="Blue"/>
<!-- checked symbol color property -->
<Setter Property="CheckedSymbolColor" Value="Red"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="telerikCheckbox:ExtendedCheckBox">
<Grid VerticalAlignment="{TemplateBinding VerticalAlignment}"
x:Name="RootGrid"
Width="{Binding Length, RelativeSource={RelativeSource TemplatedParent}}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CombinedStates">
<VisualState x:Name="UncheckedNormal">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemBaseHighColor}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding UncheckedColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding UncheckedColor, RelativeSource={RelativeSource TemplatedParent}}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UncheckedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemBaseHighColor}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding UncheckedColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding UncheckedColor, RelativeSource={RelativeSource TemplatedParent}}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UncheckedDisabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="NormalRectangle"
Storyboard.TargetProperty="Opacity"
To="0.4"
Duration="0"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="CheckedNormal">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CheckedColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<!-- set the checkedsymbolcolor property to the checkglyph foreground -->
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CheckedSymbolColor, RelativeSource={RelativeSource TemplatedParent} }"/>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="2" Storyboard.TargetProperty="StrokeThickness" Storyboard.TargetName="NormalRectangle"/>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="CheckGlyph"/>
</Storyboard>
</VisualState>
<VisualState x:Name="CheckedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CheckedColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<!-- set the checkedsymbolcolor property to the checkglyph foreground -->
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CheckedSymbolColor, RelativeSource={RelativeSource TemplatedParent}}"/>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="2" Storyboard.TargetProperty="StrokeThickness" Storyboard.TargetName="NormalRectangle"/>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="CheckGlyph"/>
</Storyboard>
</VisualState>
<VisualState x:Name="CheckedDisabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="NormalRectangle"
Storyboard.TargetProperty="Opacity"
To="0.4"
Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="CheckGlyph"
Storyboard.TargetProperty="Opacity"
To="0.4"
Duration="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="IndeterminateNormal">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateSymbolColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Glyph" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value=""/>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="CheckGlyph"/>
</Storyboard>
</VisualState>
<VisualState x:Name="IndeterminatePointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="#FFFFFFFF"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" >
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<SolidColorBrush Color="Transparent" />
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="NormalRectangle">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding IndeterminateSymbolColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Glyph" Storyboard.TargetName="CheckGlyph">
<DiscreteObjectKeyFrame KeyTime="0" Value=""/>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="CheckGlyph"/>
</Storyboard>
</VisualState>
<VisualState x:Name="IndeterminateDisabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="NormalRectangle" Storyboard.TargetProperty="Stroke">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="NormalRectangle"
Storyboard.TargetProperty="Opacity"
To="0.4"
Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Glyph">
<DiscreteObjectKeyFrame KeyTime="0" Value="" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Opacity"
To="0.4"
Duration="0" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter x:Name="ContentPresenter" Visibility="Collapsed"/>
<Rectangle x:Name="NormalRectangle"
Height="{TemplateBinding Length}"
StrokeThickness="{TemplateBinding StrokeWidth}"
UseLayoutRounding="False"/>
<FontIcon x:Name="CheckGlyph"
Foreground="{ThemeResource SystemChromeWhiteColor}"
FontSize="20"
FontFamily="{ThemeResource SymbolThemeFontFamily}"
Glyph=""
Opacity="0"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Regards,
Didi
Progress Telerik
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