For more info, see ResourceDictionary and XAML resource references. The XAML object element usage (with initialization text) is useful for declaring a Color as a resource in a XAML ResourceDictionary. Strings for named colors are interpreted based on the associated Colors constants, and the values for A, R, G and B are set in the structure as values between 0 and 255 that are representative of that color. If you use the "sc#" token, the values are also stored as values between 0 and 255, not the original value of 0 to 1. If you use the "#" token to specify color values in hex form, the hex values are stored in the structure as values between 0 and 255, not as the original hex strings. For more info, see Storyboarded animations. The Windows Runtime supports an interpolation logic so that you can animate from one Color to another in a From/ To animation and the animation will use interpolated Color values as the animation runs. These mostly support animating a Color value that exists on a Brush. There are also some XAML properties that take a direct Color value. You might also want to use system colors, which can be accessed as merged-in resources for themes that the system defines. For more info, see Optimize your XAML markup or ResourceDictionary and XAML resource references. If you use the same color brush often in your XAML, you should define a SolidColorBrush as a resource rather than using the inline implicit creation of new values, because that's more efficient. For more info on using brushes and colors in XAML, see Use brushes. ![]() This syntax implicitly creates a new SolidColorBrush with a Color value equal to Cyan that fills the Brush-type value of TextBlock.Foreground for that element. For example, you can set the Brush-type value TextBlock.Foreground using a syntax such as. However, the Brush type enables a XAML shorthand that lets you set an attribute value of type Brush using a named color string, or a format string that can be parsed into an ARGB form. Instead, a Color is used as a component value of a Brush (either SolidColorBrush or LinearGradientBrush). In most XAML UI scenarios, a Color isn't used directly as a property value of a UIElement. You can also use the Colors values for equality comparisons against a Color. For example, the Colors.AliceBlue property returns a Color that is equal to Color from the XAML usage. These properties are useful for setting Color values in code that match the attribute string form used in XAML to set a named Color. Various predefined Color values are available as static properties on the Colors class. ![]() The most frequent application of Color is to define color-related properties in a UI element as part of a UWP app using C++, C#, or Visual Basic and its XAML UI definition. Defining color values that are used for interfaces representing text, in the Windows.UI.Text namespace.Color values for XAML UI and UWP app using C++, C#, or Visual Basic, particularly for brushes.Specifically, InkDrawingAttributes.Color. Color values for the Windows 8 ink system.Colors for start screens and general UI (for example SecondaryTile.BackgroundColor and UISettings.UIElementColor).Each of the values is stored as a Byte type with value 0-255.Ĭolor values are used in these features and scenarios: Return (value is SolidColorBrush) ? (value as SolidColorBrush).Color : Colors.Black Ĭolor is a Windows Runtime structure that represents a color that has four channels: A (alpha), R (red), G (green), B (blue). Public object ConvertBack(object value, Type targetType, object parameter, string language) Return new SolidColorBrush((value is Color) ? (Color)value : Colors.Black) Public object Convert(object value, Type targetType, object parameter, string language) ![]() To see this code in context, see the source for the SwapChainPanel sample. This can be useful for databinding scenarios, because it implements the IValueConverter pattern that the Converter property of a data binding can use, and you can then bind a SolidColorBrush source to a Color target and vice versa. This code shows a two-way converter for SolidColorBrush and Color values. Note the x:Key attribute, required when you define a XAML resource. You'd typically only need this if you are defining a color that is not already one of the 250+ colors provided as the values in the Colors class, and you want to use the XAML resource system as enforcement that you're using the same color in multiple areas of your app UI. Here's the syntax for defining a Color value as a resource in a XAML ResourceDictionary.
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