Georgia: maybe these will help
You can spray paint them. Glue on fabric. Here is a nice idea
Could you take them down and hang curtains instead
They can be wallpapered. This can be done to highlight or enhance your decor.
Here's one way:
You can cover them in fabric or even decoupage them. It would be a lot of work.
Hi Georgia, here's an article that offers several suggestions for updating your vertical blinds. Maybe one of them will inspire you to make a change.
You could also draw on them with Sharpie pens. or Stencil them too. Hope thats of some help to you........
There are some ideas here:
This person replaced the slats with pallet wood...https://www.hometalk.com/3924401/diy-pallet-wood-vertical-blinds