Well, that's not the quick solution then!
You spoke about color earlier. Do you have a few ideas for me here?
Unfortunately, I'm not a design expert. I always paint colored walls with a white stripe at the top edge (just like the ceiling. That makes rooms appear, for example, taller.)
I can only recommend that you google color effects in rooms, or contact a painter.
Just found this quickly online (there are various sites).
Maybe you can also work with vertical or horizontal stripes/areas.
That would at least be my first choice, as it's easier to implement and much cheaper.
