Xamarin.CommunityToolkit by Microsoft

<PackageReference Include="Xamarin.CommunityToolkit" Version="1.2.0-pre2" />

.NET API 342,392 bytes

ColorToBlackKeyConverter

public class ColorToBlackKeyConverter : BaseConverterOneWay<Color, double>

Converts the incoming value from Color and returns the object of a type Double.

public ColorToBlackKeyConverter()