Cream, sand and soft olive have a way of settling into a room. Their warmth comes from the small differences between surfaces rather than a single matching shade.
Begin with one material
Pick a texture you love, such as speckled ceramic or woven cotton, and build around it slowly. Natural wood gives these colours a comfortable place to meet.
Try moving an existing object before adding something new. A simple change in position can reveal colours and details you had stopped noticing.