You could use painter's tape to create your geometric designs and paint them in your favorite colors.
Geometric mirror and knobs would be awesome!
Here's some wall ideas the you might consider applying to your vanity:
Hi Sheryl, hope this helps you out,
Or this, https://www.hometalk.com/14351514/before-and-after-a-geometric-mountain-makeover?expand_all_questions=1
Any of these geometric designs on other types of furniture could also be used on a vanity. Your imagination is the limit! All right here within Hometalk!
Hi Sheryl. You could make your own lines and color them in with colors of your choice. Use at least 2 - 3 colors for continuity. Sheryl, please consider posting this project here. We would love to see it. Good luck to you.
Here is one i painted a while ago. https://uniquecreationsbyanita.com/old-dresser-gets-a-geometric-makeover/
Hello. Here is an link for your consideration. Hope this helps.