It’s very odd. I have the Hook Element Block opened right now and there is nothing in there but a title and the actual Reusable block. And the original block consists of:
GB Container (Gradient bg) — GB Container (not sure why I have another GB Container but this one has no bg gradient or bg colour. — GB Grid of 4 columns. Maybe adding the GB Grid added the extra container (but that is for another day)?
I will keep poking around. I have no idea why there would be a colour discrepancy between the original block and a reusable block that was a SAVE from the original. Wait a sec…
Your comment made me look at the Hook a different way.
When I hook the saved block into “generate_inside_site_container”, the colours match. It is when the Hook is targeting “generate_before_footer” then the colours do not match. Maybe that section of GP has a different bg setting? Interesting. Not sure if it’s a glitch or by design. Since I want this new Block Element to be part of the footer (site wide), I will build it with the colour discrepancy in mind.