The color you refer to is actual tissue damage, more than a simple mucoual(?) blockage.
From years of tormenting your gut...its not a quick treatment.
SO, flushes cleanse the toxin, BUT it takes time (lifestyle/diet change) to actually heal the tissue. SInce I can't look myself I can't predict the time. BUT for me it took about a litle more than ayear to restore the pupil around the pupil from a minor color lesion. NO GRAin, & the Blood-Type diet should be the path...