Our paper about the database and website is now published in Applied Volcanology! It’s open-source and available here.
In this work, we present the database and website, discuss the map classification scheme, explore the enormous diversity of hazard maps, and suggest ways that the database and website can be used by the community for education, outreach, and engagement with map users and stakeholders.

color-scheme in question. Note that most of these color schemes might be used as gradients or as discrete colored zones
Full paper citation:
Ogburn, S. E., Charlton, D., Norgaard, D., Wright, H. M., Calder, E. S., Lindsay, J., Ewert, J., Takarada, S. & Tajima, Y. (2023). The Volcanic Hazard Maps Database: an initiative of the IAVCEI Commission on Volcanic Hazards and Risk. Journal of Applied Volcanology, 12(1), 1-25. https://doi.org/10.1186/s13617-022-00128-9