/// <summary>
 /// System.Drawing.Color to C4f.
 /// </summary>
 public static C4f ToC4f(this Color color) => new C4f(
     Col.FloatFromByte(color.R),
     Col.FloatFromByte(color.G),
     Col.FloatFromByte(color.B),
     Col.FloatFromByte(color.A));
 /// <summary>
 /// System.Drawing.Color to C3f.
 /// </summary>
 public static C3f ToC3f(this Color color) => new C3f(
     Col.FloatFromByte(color.R),
     Col.FloatFromByte(color.G),
     Col.FloatFromByte(color.B));