Volume Component to allow the configuration of the Outline color and Width for Unity' URP 3D Sample: https://unity.com/demos/urp-3d-sample

OutlineVolumeComponent.cs

using UnityEngine;
using UnityEngine.Rendering;

[VolumeComponentMenu("Sample Scene/Outline")]
public class OutlineVolumeComponent : VolumeComponent
{
    public BoolParameter Enabled = new BoolParameter(false);

    public ColorParameter outlineColor = new ColorParameter(Color.white, true, false, false);
    public ClampedFloatParameter outlineWidth = new ClampedFloatParameter(0,0, 10.0f);
}