Bedroom color advice usually arrives as a list of approved shades. The better question is what your room does with light, because the same paint reads completely differently in a north-facing box and a south-facing one.
Before choosing a color, spend a day noticing the room. A bedroom that gets strong direct sun can carry cool colors that would feel like a basement in a north-facing room. A dim room needs warmth in the paint or it will read as cold at every hour.
This is the part where feng shui and interior decorating agree completely, and it should outrank any element-based color rule. A room that feels good to be in at eight in the evening is doing its job.
Skin tones are the most reliably recommended group: warm neutrals, soft taupe, dusty rose, and muted terracotta. They are grounding without being heavy, and they work with most bedding.
Soft greens are the second safe group, particularly sage and muted eucalyptus. Green is the wood element, associated with growth and recovery, and it is the easiest color to live with long-term.
Warm whites and creams are fine and often better than people expect, provided they are genuinely warm. A blue-based white in a bedroom reads as clinical.
Soft blues and lavenders are used where the aim is calm rather than grounding. They suit a room that runs hot, and they are a reasonable choice for a bedroom that doubles as a workspace.
Strong red. The most common feng shui warning, and the one with the most agreement behind it. Red is activating. It is appropriate in a dining room or a shop, and it works against a room whose entire purpose is to wind you down. A red accent cushion is fine; red walls are not.
Very dark colors in a small room. Deep charcoal or near-black can look superb in a large bedroom with good light. In a small one it removes the sense of space and tends to make the room feel lower than it is.
High-gloss anything. Not a color issue but a finish one. Glossy surfaces reflect light the way a mirror does, which puts it in the same category as the mirror-facing-the-bed problem.
If you want a stronger color, the wall behind the bed is the conventional place for it, because it gives the sleeper a sense of backing and support. This mirrors the headboard-against-a-solid-wall rule.
Avoid putting the strongest color on the wall you see from the pillow, which is usually the one opposite the bed. That is the surface you look at while falling asleep.
No. A warm white is one of the safest choices. A very cool, blue-based white can feel clinical, so check the undertone against your bedding in daylight before committing.
In a large room with good light, a dark or near-black wall can work well. In a small or dim room it tends to close the space in. Test it on a large board first rather than on the wall.
The same guidance applies, with more tolerance for brighter color. Children's rooms are play spaces as well as sleep spaces, and a room they like is better than a technically correct one they resist.