It has almost all blue flame. The refills are sold at MR DIY, little bottles for 5 baht. They are available at the Avenue Mr DIY, didn't see those cheap refills at Royal Garden. Other refills are available for a higher price as well (17 baht?), but the 5 baht ones work fine. There is no adapter for anything, the nozzle of the refill thingie goes in the bottom of the torch.
Edit: Forgot, here's a Chinese knockoff heater for only 2,000. https://vi.aliexpress.com/i/1005005178875101.html