Light coloured wall and floor. Timber and black accents. For a super high ceilings use a picture rail to add things like whiteboards, business certificates and decorative images. The rail anchors them so they don't get lost in the large wall space.
Again here is another example of the two different fonts working together. I like the bold hello and the simple curled why. It works really well together its plain and simple yet so effective and eye catching.
Gallery of Carling Residence / Tact Architecture - 5