def get_color(self, asset_string):
response = self._requester.request(<EOL>'<STR_LIT:GET>',<EOL>'<STR_LIT>'.format(self.id, asset_string)<EOL>)<EOL>return response.json()<EOL>
Return the custom colors that have been saved by this user for a given context.

The `asset_string` parameter should be in the format 'context_id', for example 'course_42'.

:calls: `GET /api/v1/users/:id/colors/:asset_string \
<https://canvas.instructure.com/doc/api/users.html#method.users.get_custom_color>`_

:param asset_string: The asset to retrieve the color from.
:type asset_string: str
:rtype: dict