You're very welcome, wheel-city.
If you are in explorer mode, perhaps have a look here.
https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2023_PROJECTS_DRS/20230514_CV4_2023_drs_23_RSvm_01.zip
I have transferred the Color to the Vertices. From there to a MoGraph Matrix Object. This, in return, allowed me to place the data into a Color Vertex Tag for the Volume Mesher.
It depends highly on the point density of the Object used to feed the Volume. In the example I kept it kind of low.
All the best
Screen Shot 2023-05-14 at 11.06.22 AM.jpg