<PackageReference Include="System.Drawing.Common" Version="10.0.4" />

System.Drawing.Imaging.Effects.HighlightCurveEffect

Increases or decreases the value of a color channel if that channel already has a value that is above half intensity.
namespace System.Drawing.Imaging.Effects { public class HighlightCurveEffect : ColorCurveEffect { public int Highlight { get; } public HighlightCurveEffect(CurveChannel channel, int highlight); } }