One thing about East Asian yellow tint in skin is that there really isn't such a thing. Asian base skin color is same as Europeans, if slightly more reddish or slightly more fatty or whatnot, but more or less within margins of error. It's largely an invention from late Age of Discovery era to feed to us-them mentality, with perhaps some effect of malnourishment and sunlight some deep southeast guys was living with at the time of their first contacts.