Can you send photo of entire room ?

Would you paint the entire room orange or just the backsplash

I'd wait until the whole kitchen is in before painting.

I like your idea of a light green. I think this will feel fresh in your kitchen and flow better with the light countertops and white cabinetry. Like fresh vegetables :) My concern with bold red walls is the high contrast, and may be a bit overpowering everyday. What about painting the walls green with a white backsplash?

I'd equate it to Sherwin Williams 6450 Easy Green. I like the slight blue undertone instead of yellow. Maybe mix in a multicolor green mosaic tile for the backsplash if you want some more "umph"?