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Sound in every
shade.

Free noise generators for sleep, ADHD focus, and deep relaxation. Brown noise, white noise, pink noise — all in your browser, no download needed.

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All noise colors

Every frequency on the spectrum.

Brown Noise

White Noise

Pink Noise

Green Noise

Blue Noise

Grey Noise

Violet Noise

Orange Noise

Red Noise

Yellow Noise

What is color noise?

Color noise refers to different types of random audio signals, each named after a color by analogy with the visible light spectrum. Just as colors differ in their light frequency, noise colors differ in how power is distributed across the audible frequency range.

White noise has equal power at every frequency — the brightest, most neutral sound. Brown noise (or red noise) rolls off sharply toward higher frequencies, creating a deep bass rumble. Pink noise sits between them, with equal energy per octave — the most natural-sounding of the three.

These sounds work for sleep and focus by raising the ambient noise floor, which makes sudden disruptive sounds — a door slam, a car horn — less jarring by comparison. This is called sound masking, and it's the same technology used in hospitals, offices, and sleep clinics worldwide.

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Sleep

Mask sudden sounds that wake light sleepers

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ADHD Focus

Brown noise helps regulate attention and reduce distractions

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Relaxation

Lower cortisol and anxiety with consistent sound

From the blog

Science, guides, and comparisons.

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Brownian Noise vs White Noise: The Same Comparison, Explained Right

Brownian noise vs white noise — the science behind the comparison, which one is better for sleep and focus, and why 'Brownian' isn't what you might think.

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Orange Noise Benefits: What This Rare Noise Color Actually Does

Orange noise is one of the least-known noise colors — but for musicians and sensitive listeners, it has specific benefits. Here's what it's actually good for.