<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _choose_scheme(self):
 """Choose color scheme"""

        if self.style_cols[self.color] in ('string', 'boolean', ):
            self.scheme = antique(10)
        elif self.style_cols[self.color] in ('number', ):
            self.scheme = mint(5)
        elif self.style_cols[self.color] in ('date', 'geometry', ):
            raise ValueError(
                'Cannot style column `{col}` of type `{type}`. It must be '
                'numeric, text, or boolean.'.format(
                    col=self.color, type=self.style_cols[self.color]))