How to perk it up, changing the look of kitchen
Consider changing the grout to a fun color like the sparkly blue.
Add colorful decals or use 3M Command Hooks or tape and place some decorative pictures or items to break up the white tiles you don't like much. The change in grout color Kathy mentioned might jazz it up for you, too. Good idea!
Can you post a few images of your kitchen so we can see what you are working with?
Here's an easy update and you don't have to remove the existing tile backsplash! https://bachelorettepadflip.com/2014/03/03/diy-kitchen-backsplash-tutorial/
Here is an easy backsplash update we did https://www.homeroad.net/2013/09/tin-ceiling-backsplash.html#more
You could paint and stencil it