Not in my experience. I asked nb to create a transparent rectangle shape and gave it RGB hex for the fill. It created the box but put the hex as text inside of it and used a checkerboard for its background. When I told it that the image wasn't transparent, it wouldn't budge!

Not very capable, though. It's incredibly hard to get it to fix mistakes and not double down/lie. Creating a new context window and trying again is easier - but I've not had a lot of success getting it to do the thing that isn't obvious to it.