Hi,
for better convenience it would be great if custom Palettes could be added to the node. So a CI (Corporate Identity) could be easily attempted.
There are several formats, that would come in mind:
Affiliate (now free of cost, acquired by Canva) ← personal favorite
CSS classes
JS arrays [‘#e5f5f9’,‘#99d8c9’,‘#2ca25f’]
OR
Color Ramps from the Geospatial View node 
–> Matplotlib
Imho it should be a widely used format, so that it could be used by other software as well.
Thanks