would like to keep my desert gem cacti blue. where would I be able to buy color to achieve this

Question

I have learned my desert gem cacti will eventually grow and no longer be blue. I am hoping to find an access to getting the dye needed for re coating in the future and keeping it blue

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Answer 1

The Cactus have color added to the spines and not to the green body.
The Cactus will breath and photosynthesize the new growth will come out white, rather than colorful.
There is no way to color these on your own.
The company claims they will retain color for years, as they are slow growing.