Hoy! For any Godot devs out there, I've cooked up an importer utility based on this palette format! Cross-compatibility!!!
https://sunfire-interactive.itch.io/mixolumia-palette-importer
And for good measure, here's a palette of my own:
[x]
name=Arboretum
author=@sunfire_intrc
0=221100
1=57493c
2=ffeedd
3=ceb4a1
4=339944
5=4466aa
You can really spot which of these colors i was using in another project by the compulsion to double up in the hex code :P