Next to Kebabish Chippery?
A pale colour (eg the same light blue) may show the difference in textures between the brick and render more. A darker blue all over with the stonework showing lighter gray might look better.
Then you will have a good contrast to light or reflective letter signage.
Personally I'd prefer to take all the render and the signboards off and return the whole wall to original coursed stone, but budget and the underlying condition might not allow that.