internal Color16Gray(Color32 c) { var c64 = new Color64(c); Value = (ushort)(c64.R * ColorExtensions.RLum + c64.G * ColorExtensions.GLum + c64.B * ColorExtensions.BLum); }
internal static Color48 FromRgb(long rgb) => new Color48(Color64.FromRgb(rgb));
internal Color48(Color64 c) { B = c.B; G = c.G; R = c.R; }