Begin with the largest surfaces in your room: walls, flooring and seating. Choose a quiet base colour that works with what you already have.
Layer, rather than match
A linen-look curtain, a textured rug and a soft throw can feel connected without being identical. Repeat one or two tones across the room and vary their textures.
Add a personal detail
A decorative piece, a favourite object or a woven accent can give the room a point of interest. Leave enough breathing room for each piece to be appreciated.