Using two different coloured pillowcases is a great way to create layered bedding. Add a throw at the end in the secondary colour, with a simple oversized lumbar to finish the look. Love the grey and beige colour scheme too!
The best way to make a small space feel larger is to incorporate vertical elements. In this case, the woods wallpaper works with the high bookcase. I especially love how nothing went to waste here and the extra paper was used to make book covers. Woods wallpaper is available at walnut wallpaper #wallpaper
Another example of the neutral room with just a spatter of color, the two ottomans and again, that important vase of fresh flowers. Esp. nice for your house guest. Makes them feel welcome and pampered.