Does anyone know when the color herringbone was introduced by Certianteed? I am investigating using this color on my home but want to know if it will be discontinued soon. It is a special order but want to know if it will be around long.

That color is available on almost all of their siding. You could ask them but I doubt if they would say anything about dropping a particular color. When I buy siding I buy 10% extra for errors and spares. You should be safe doing the same.

I think a call or email to Certainteed would be a good start!