Can you show us the rug? Then maybe I can make an intelligent suggestion!!

Hiya, we have a Victorian hallway and it is done very similar to Rukmini’s first image. We have a greeny grey under the dado (including the skirting and dado itself) and on the doors and architraves. It’s Blanket by Paint & Paper library which is a little darker than Rukmini’s pic. Then an off white above the dado and on the ceiling. It used to be off white all over and the grey definitely has made it darker. On the other hand it also feels smarter and shows the marks less! Swings and roundabouts. I wouldn’t have three colours, I would pick one colour plus off white above the dado/picture rail (Pointing seems sensible!!) Your tiles look browny grey so would suggest looking at Ammonite by F&B and its family of colours - (Cornforth White, Purbeck Stone). See below for the F&B families of greys. If you want bluey or greeny greys then Paint & Paper Library are a good source but be careful to see if they will go with your tiles.

Thanks for your comment, I’ve looked on F&B and they pair it with Green but was hoping someone on here had used James White with a different colour. The flooring is going to Be a wood effect tiled floor (Porcelenosa’s Manhattan colonial tile) https://www.porcelanosa.com/uk/manhattan-colonial-29-4x120

Sorry, i think your details stand out but the neighbours details are a little lost although it looks really nice? Was just wondering if you’d consider painting the black bits on yours a slightly darker shade like SL dark or serpentine? Just a thought anyway, what does the rest of the street look like? Good luck anyway, i went through so many testers for mine! i’d probably paint the red bit white so you can easily test next to the neighbour. Colours are also a couple of shades lighter outside and it may look different on the brick versus the render