def disable_multicolor(self):
        """ swap from the multicolor image to the single color image """
        # disable the multicolor image
        for color in ['red', 'green', 'blue']:
            self.multicolorscales[color].config(state=tk.DISABLED, bg='grey')
            self.multicolorframes[color].config(bg='grey')
            self.multicolorlabels[color].config(bg='grey')
            self.multicolordropdowns[color].config(bg='grey', state=tk.DISABLED)
            self.multicolorminscale[color].config(bg='grey', state=tk.DISABLED)
            self.multicolormaxscale[color].config(bg='grey', state=tk.DISABLED)

        # enable the single color
        self.singlecolorscale.config(state=tk.NORMAL, bg=self.single_color_theme)
        self.singlecolorframe.config(bg=self.single_color_theme)
        self.singlecolorlabel.config(bg=self.single_color_theme)
        self.singlecolordropdown.config(bg=self.single_color_theme, state=tk.NORMAL)
        self.singlecolorminscale.config(bg=self.single_color_theme, state=tk.NORMAL)
        self.singlecolormaxscale.config(bg=self.single_color_theme, state=tk.NORMAL)
swap from the multicolor image to the single color image