The photo on Bezark's page (by Makihara) is totally incorrect as well. Unfortunately, there are numerous images published in Makihara's publications on Indonesian Cerambycidae that are incorrect!
I have photos of most types of C. grammicus ssp. None of them have any blue. I have other type photos of Cylindrepomus, but certainly not all of them.
Whatever this species is, it would certainly have been previously recorded from Ceram (Seram) or the Moluccas, or possibly even Sulawesi.