Hmm, couldn’t actually find any info on that other than changelog (https://www.wpbeaverbuilder.com/change-logs/, Beaver Builder Plugin, see under “2.2-alpha.2 – 10/04/2018”) and some announcement via email. And of course the button next to the color field in BB which leads to the following selection:
– Posts/Post custom field
– Author/Author meta
– User/User meta
Perhaps contect the BB team and ask for some dev reference. It would be great to have in the Theme Customizer (Premium probably) under colors an option like “Custom color 1”, “Custom color 2” etc.
I wrote to BB support to ask for that. If I get a reply I’ll let you know.
Thx.