Is the pic of the house attached to this discussion exterior rendered in Taubmans pebble bay?

With a million variations through a million computer screens you will get a million suggestions and very confused while no closer to your answer. You have to do the work yourself and either get a colour match to a chip the min of a 50c piece or buy a Dulux or Taubmans fan deck and select a colour as close as you can. Alternately get a professional painter or decorator to use their fan deck or atlas to colour match for you and be prepared to pay them for their time.

I wouldn’t render. I don’t think you need to. The pillar colour is the odd colour but I’d leave it for the time being. I’d put the money and effort into the landscaping inc a mature tree or two. If you’re still unhappy after the garden is in then rethink painting the pillar and adding render.

Dulux terrace white has a grey undertone, so should blend in well with the slate grey roof and carport roof. I would look at painting the front door slate grey to match other trims.