This project is looking great! But those blue columns bother me too. I wonder if you could get some black pvc tubes just a bit larger in diameter than the columns, split them down one side and then put them around the columns to cover them. Or you could probably paint them, but then you'd have to disassemble the platform and that doesn't sound fun. Another option might be to get some fake vines and wrap them around, or some tall fake aquarium plants to stand around the columns. Just some ideas.
Love what you've done with it and can't wait to see the next updates!