Quick answer: White, pink, and brown noise are steady background sounds with different frequency balances. White is brighter (static-like), pink is softer (rain-like), brown is deeper (rumble/waterfall). For sleep, most people start with pink or brown at a low volume — then test for a week.
This free guide covers what each color means, when to try it, volume safety tips, and a simple 7-night test. Not medical advice.
What “noise color” means
Noise colors describe how energy is spread across frequencies. For sleep, the three you see everywhere are white, pink, and brown (sometimes called red). They are not treatments. They are predictable backgrounds that can mask sudden noises and give a busy mind something steady to settle on.
Quick comparison
| Color | Sounds like | Often best for |
|---|---|---|
| White | TV static, steady hiss | Masking sharp or high noises; some focus tasks |
| Pink | Steady rain, softer hiss | Sleep and wind-down for many people |
| Brown | Deep rumble, distant thunder, strong waterfall | Racing thoughts, heavier low-frequency mask |
White noise
Equal energy across audible frequencies. Good at covering clicks, voices, and higher street noise. Some people find the hiss harsh at bedtime and switch to pink or brown.
Pink noise
More energy in lower frequencies than white, so it usually sounds softer. A common default for sleep and relaxation.
Brown noise
Even more low-frequency emphasis — deeper and darker. Popular for a racing mind at night. Head-to-head proof that brown “beats” white for ADHD or sleep is still limited; the honest approach is a short personal test.
Volume and safety
- Keep volume as low as possible while still masking the problem sound.
- Be careful with loud machines near infants; follow pediatric distance and volume guidance.
- If your ears feel tired, or you keep turning it up, lower the level or take a break.
- Overnight headphones are optional — moderate volume only.
7-night test plan
Keep bedtime and wake time similar. Change only the noise color. Rate sleep quality 1–5 each morning.
- Nights 1–2: White noise, low volume
- Nights 3–4: Pink noise, same volume and timing
- Nights 5–6: Brown noise, same volume and timing
- Night 7: Use the week’s winner (or silence) and note which felt easiest
Optional notes: rough time to fall asleep, night wakings, morning grogginess. The winner is the one you actually want to run again.
Try it free on this site
Blend rain, ocean, brown noise, and fan in the Sleep Sound Mixer.
Related: Brown noise vs white noise · Sleep Cycle Calculator
General information only — not medical advice.