CINDYH the paperbark picture is a display home that it says on their website the roof is Woodland Grey. Colours look so different on computers.
If you have narrowed down your choices I would suggest get a couple of pieces of A3 card from the newsagency. Paint 2 coats of your colours (use sample pots) on each card. Look at them outside in full sun and the shade. Also do 1 A3 card in the Woodland Grey too. That way you can compare the grey and other colours outside too.
When you pick a colour grab a large box. I got one from a local fridge store. Paint the box in your chosen colour at least 2 coats. Look at in sun and shade and preferably at the block you are building on. You should get a good idea from that of what it will look like.