Why do your hair extensions turn orange in summer and how to prevent it.

Have your blonde, highlighted, or balayaged extensions turned orange or green after just a few days in the sun? This is a well-known issue among professionals, with very specific causes: UV rays, sunscreens, hair mists, mineral-rich water… The good news? It’s easy to avoid — and totally reversible if it’s already happened.

Here’s everything you need to know to protect your extensions and maintain radiant color all summer long.

Why do blonde extensions change color in the sun?

Light shades (like icy blonde, beige, ash, or honey balayage) are more sensitive to external factors, especially when they’ve already undergone chemical lightening.

More porous means more vulnerable

Chemically treated extensions become porous. The result? They absorb everything:

• UV rays from the sun,
• Chemicals from sunscreens for hair and body,
• Minerals in water (sea, pool, shower).

Together, these create an oxidation reaction that alters the original pigments, leading to the dreaded brassy tones.

⚠️ Ashy blondes are especially at risk. The copper in water combined with a very cool base can turn them green. Frustrating — but totally preventable with the right routine.

Sunscreen, UV, and water: the damaging trio

Ingredients to avoid in your sun care products

Some sunscreens or hair sprays contain molecules that are incompatible with colored or bleached hair:

• Avobenzone (Butyl Methoxydibenzoylmethane): a common UV filter, but very unstable.
• Octocrylene: used to stabilize avobenzone, but triggers photochemical reactions.

What exactly happens

Under UV exposure, the chemicals in sun products trigger photochemical reactions. These create free radicals (ROS – Reactive Oxygen Species) that attack hair pigments and alter color.

And water doesn’t help. Whether it’s seawater, pool water, or your shower, minerals like iron, copper, calcium, and magnesium cling to the hair fiber. In pools, chlorine and copper used to disinfect water accelerate oxidation — especially on already fragile hair.

Result: blonde extensions turn brassy, and ash blondes may even turn green.

How to prevent your extensions from turning orange

5 essential tips for sunny days

1. Rinse your hair with fresh water before every swim: this limits the absorption of chlorine or salt.

2. Choose sun care products that respect your hair: prefer mineral formulas without avobenzone or octocrylene, and with natural ingredients.

Recommended: Bare Republic Mineral Sunscreen Baby Lotion SPF 50 and Coola Mineral Body Sunscreen.

3. Protect your lengths before exposure: apply conditioner or a suitable hair mist.

Recommendation: Sun Defense Hair Mist by HairLust.

4. Tie your hair to minimize water contact: a high ponytail or loose bun helps reduce splashes.

5. Rinse thoroughly after each swim: pressurized fresh water removes salt and chlorine residues.

These simple yet effective tips will help preserve the shine and color of your extensions all summer.

What to do if your extensions turn orange or green?

If your extensions changed color due to sun or chlorine, don’t panic: there are effective ways to fix it — if you use the right products and follow specific steps.

Professional protocol (for certified stylists)

What not to do

❌ Don’t bleach already oxidized extensions at home.

❌ Avoid using vinegar or any DIY acid mixtures.

❌ Don’t cut extensions without a certified stylist's opinion.

If in doubt, always seek help from a certified salon or your trusted stylist. A proper diagnosis can often save your lengths and extend the life of your extensions.

Key takeaways

FAQ — Frequently Asked Questions