private static StringBuilder SetColorColor(this StringBuilder b, Mode mode, AnsiColor color) => b
.Escape()
.Append('[')
.Append((byte)mode)
.Append(";2;")
.Append(color.R).Append(';')
.Append(color.G).Append(';')
.Append(color.B).Append('m');
public static StringBuilder SetForegroundColor(this StringBuilder b, AnsiColor color) => b.SetColorColor(Mode.SetForegroundColor, color);