Sets the default color of embeds.

async def _setcolor(self, *, color : discord.Colour):
        """Sets the default color of embeds."""
        data = self.bot.config.get("meta", {})
        data['default_color'] = str(color)
        await self.bot.config.put('meta', data)
        await self.bot.responses.basic(message="The default color has been updated.")