    def scatter(self, ax, X, Y, Z=None, color=Tango.colorsHex['mediumBlue'], label=None, marker='o', **kwargs):
        if Z is not None:
            return ax.scatter(X, Y, c=color, zs=Z, label=label, marker=marker, **kwargs)
        return ax.scatter(X, Y, c=color, label=label, marker=marker, **kwargs)