hello and welcome to hcm, forum leon,
thank you for posting your query, although the information that you have provided is not clear , but still i would like to inform you that excessive use of a mouth wash causes discoloration of teeth and sorrounding tissues, this might be one of the reasons for the color of saliva, also smoking
is one of the reasons but as you said you have already quit smoking,therefore i assume its either due to the mouth wash or due to "periodontitis", it a condition wherein gums become swollen and teeth become loose, mainly due to poor oral hygiene
, smoking, diabetes
i appreciate that you are maintaining proper oral hygiene now, but kindly visit your dentist
once to get the teeth cleaned professionally.
i wish you good health,