Hi! Sorry for very very late reply. It's kind of light blue, not navy blue. I only have access to the type of PVC (as shown in attached photo) in my country.What I did was I followed the instructions, but instead of using stones in the inlay (where the stones just came out during sanding), I applied some super glue in the groove and put some saw dust which I got from nearby furniture workshop. :)
PVC Ring With Stone Inlay.