Do you have extra tiles for that backsplash? It's going to be impossible to remove and replace a counter without needing to replace some of those lower tiles. if it weren't for the dark backsplash, I would say go ahead with the lighter countertop because you do have so many other dark colors in the room already, and a dark countertop would just make everything darker. Here's the issue though: your wall color and you backsplash color don't lend themselves to white or light pairing on the countertop. I would pause, take some time, and reconsider the whole-kitchen color scheme. See if you can find photos here at Houzz, on Pinterest, or through Google searches with kitchens that have your same cabinetry colors yet with all different kinds of wall colors and backsplashes, etc. Given that your backsplash will already be damaged with a replacement countertop, you have every opportunity to do a total makeover here if you wanted to do so. I'd make sure you had a clear idea of how all the colors will work together before proceeding. If you feel challenged with color selection, you might want to consider hiring a designer who specializes in color. Maria Killam is an amazing expert, and I believe she even offers some online consultations.

Thank you for your suggestiond

Get rid of the splash too. It’s way dark. And you need better lighting.

Thank you