Don't print photos from a website and think when you get to the store the samples will be the same. Get the names of the paints you want, go to the store, pick up swatches and maybe get some color samples.

The beauty of paint shops is that the paint chips are usually free. Pick up as many as you like and bring them home. Or buy a fan deck of the colours from BM. Then you can narrow it down to what you like. Then get some tester pots and try the colours in the room(s) and see what the light does to the colour. Choosing the right paint can take a significant amount of time but it is time worth spending.