...from the Hulda Clark site. And yep, the tubing is tinted blue.
It would seem whatever company is supplying the smaller suppliers has changed the tubing.
I soaked mine (bucket & tubing) in Miracle II soap, 1/2 cup of 3% hydrogen peroxide and ultra hot water, and nothing came off the tubing. Then I did a CE, and rinsed it with ultra hot water, and still no 'leaking of color' is apparent to me.