Lower saturation tends to read as calmer
Muted, lower-saturation versions of colors — dusty blues, soft sage greens, warm greiges — generally feel more restful than bright, highly saturated tones, which can feel more energizing than relaxing in a space meant for sleep.
Limit the palette to two or three tones
A simple palette (a wall color, a bedding tone, and one accent) tends to feel more cohesive and calm than a room with many competing colors and patterns.
Consider how the color looks at night
Since bedrooms are often used in low light — early morning and evening — testing a paint color under lamp light, not just daylight, can prevent an unwelcome surprise once the room is finished.
