I really don't master correctly Poser13's new PrincipledVolume, but here an example to start with

The bright contrast node helps me to have the same color but darker
If the emission strength is too high, you'll end up with nothing to see

In the example below, I've setup a vase with a strong blue source spot (1000%)

𝒫𝒽𝓎𝓁

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👿 Win11 on i9-13900K@5GHz, 64GB, RoG Strix B760F Gamng, Asus Tuf Gaming RTX 4070 OC Edition, 1 TB SSD, 6+4+8TB HD
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👿 Poser 13 and soon 14 ❤️