First off - what an absolutely wonderful space! Especially love the juxtaposition of the steel and wood framing. It's marvelous. If you paint the beams black I think that will make them less apparent. However if you paint the column black IMHO that will make it more apparent. So, kinda depends on what your goal is. Don't see anything wrong with leaving the color as is now either. Am really blown away by how beautiful the whole space is.

Wow such a great space! i love the green - it’s interesting, looks great with the wood and not as harsh as black, but could also see a case for the black

Adds a bit of an industrial feel and might darken the space. The green has a softer, eclectic look. How do you want the space to feel - are the room’s contents yours or the previous owners?

Maybe wait a bit and you may even decide on another color. It’s a big job and commitment; maybe test on one beam (if any green paint was left).

I love the green but I am trying to make the space my own. We kept some of the furniture. I have alot of art of my own. The book shelves are actually filled with art of all kinds and colors. my taste is pretty eclectic. There is alot of natural light but the space is a bit dark.

In the picture above, I like the wood look of the main ceiling, but, I also like the black, or a dark charcoal like the support post and the other beams. It adds a bit more drama, than all light like it is right now.

It would be helpful to see how it looks now. What an interesting space! I think either okay but I would want something a little less harsh than black. I would live with the current color for awhile before deciding.

how about a photo of what it looks like now with your furnishings.

I would not paint them black, but a dark color you already have in the space.

I agree with making it your own, graphite, bronze, even a deep red. It all depends on YOU.

I love the black or a dark charcoal gray.

Here is brown to match the beams.

Lovely space. Live with the light green for a bit. Why highlight the beams with black when there are so many other interesting elements in the room as well?

What a great space!!

I don't like that particular shade of green (personal preference), but more than that IMO it fights with the wood ceiling. Don't like the black mock-up either -- too harsh. Maybe a rich chocolate brown. Or, pull something from your artwork. See the deeper red-brown or the rusty darker red in the picture of the naked lady? There you go. What colors do you have in your art that you can pull out and repeat on the beams?

I love the black.

I kind of like the green I would live with it for awhile if you like it too.