def with_white_ref(self, wref, labAsRef=False):
if labAsRef:<EOL><INDENT>l, a, b = self.lab<EOL>return Color.from_lab(l, a, b, self.__a, wref)<EOL><DEDENT>else:<EOL><INDENT>return Color(self.__rgb, '<STR_LIT>', self.__a, wref)<EOL><DEDENT>
Create a new instance based on this one with a new white reference.

        Parameters:
          :wref:
            The whitepoint reference.
          :labAsRef:
            If True, the L*a*b* values of the current instance are used as reference
            for the new color; otherwise, the RGB values are used as reference.

        Returns:
          A grapefruit.Color instance.


        >>> c = Color.from_rgb(1.0, 0.5, 0.0, 1.0, WHITE_REFERENCE['std_D65'])

        >>> c2 = c.with_white_ref(WHITE_REFERENCE['sup_D50'])
        >>> c2.rgb
        (1.0, 0.5, 0.0)
        >>> '(%g, %g, %g)' % c2.white_ref
        '(0.967206, 1, 0.81428)'

        >>> c2 = c.with_white_ref(WHITE_REFERENCE['sup_D50'], labAsRef=True)
        >>> '(%g, %g, %g)' % c2.rgb
        '(1.01463, 0.490341, -0.148133)'
        >>> '(%g, %g, %g)' % c2.white_ref
        '(0.967206, 1, 0.81428)'
        >>> '(%g, %g, %g)' % c.lab
        '(66.9518, 0.430841, 0.739692)'
        >>> '(%g, %g, %g)' % c2.lab
        '(66.9518, 0.430841, 0.739693)'