Brassy Isn’t a Blonde Thing
We’re noticing it on more clients lately and it’s got us thinking about how often it comes up. Hair colour looking a bit dull. A bit warm. Brassy, even.
Most people assume brassiness is only a blonde problem. It’s not. It happens to anyone with colour-treated hair — brunette, copper, caramel, platinum, doesn’t matter. It sneaks in fast, especially with hard water, pool time, beach days, or just not clarifying often enough.
If you’ve ever coloured your hair, you’ll deal with it at some point. And even if you haven’t, you might still be seeing dullness, uneven tone, or a shift in shine that traces back to the same cause: build-up.
What actually causes it
Hard water — the biggest culprit. Calcium, magnesium and iron cling to your strands and shift how your colour reads. Coppery undertones in darker hair, yellow tinge in lighter hair, dulled shine either way.
Sun exposure — UV breaks down colour molecules. If your hair’s lightened or highlighted, it’s more porous, so it soaks up more sun and warms up faster.
Product and oil build-up — dry shampoo, serums, leave-ins, your scalp’s own oils. None of it feels heavy day to day, but it stacks up and makes colour look muddy or straight-up orange.
Chlorine and salt water — both rough up the cuticle. That green tint you sometimes see after a swim is oxidation happening right on the hair.
The wrong shampoo — over-toning can leave hair flat or tinted violet. Sulfate-heavy or silicone-laden formulas strip or coat the hair, which blocks your true colour from showing through.
How we fix it
Two goals: remove what doesn’t belong, protect what does.
Clarify weekly, properly. A clarifying shampoo alone isn’t enough if there’s real build-up. We recommend Mr Smith Scalp Cleanse — it detoxifies and rebalances without stripping the hair or over-drying the scalp.
Tone with purpose, not habit. If brassiness is showing up as yellow-orange (common in lightened, blonde, white or grey hair), Oway Bluemoon Hair Bath uses natural pigments to neutralise it without turning hair flat or violet — used once or twice a week, not daily.
Look after it after the pool or the beach. Chlorine and sun both rough up the cuticle. Oway’s After-Sun Hair & Body Bath and After-Sun Mask reset hair that’s been in the sun or the pool, restoring softness and shine without a heavy strip-back.
Protect before you’re in the sun. UV breaks down colour molecules fast in lightened hair. A hat helps. So does keeping styling to a minimum on big sun days — less heat and UV stress means less colour fade and fewer split ends.
Brassiness isn’t inevitable — it’s just build-up you haven’t dealt with yet.
