Interior Designer/ Colour Consultant

I am about to under go a bathroom renovation in our main bathroom and ensuite, we're also laying new carpet in the bedrooms and study. I have done lots of research on Pinterest and had builders come and help me with the layout and design of the bathrooms but I'm finding it hard to make sure all the colours work well together. I want a qualified and experienced designer to help with the design, texture and colour choices and create the layout with some different options for me. The ensuite and main bathroom design needs to tie in and flow with the rest of our home, without completely matching. We are sticking to a light/grey colour scheme with black tap ware and hopefully some feature tiles. Want something that won't date quickly. I'm after someone that has experience in this and previously worked on things like this before. I need someone that will be able to give good professional advice/feedback/ resources where to source certain tiles and looks from. You MUST have images of your previous work showing before and afters of what you created. I want to be able to visualise exactly what it will look like.