- At the beach or pool, protect your scalp and strands by wetting your hair with a mix of one liter of water and a capful of sunscreen, then slicking it back in a ponytail.
- Before swimming, coat your strands with conditioner; this makes color molecules less apt to slide out when you hit the water. Post-swim, rinse your hair with bottled spring water.
- If, despite your best efforts, you still notice an unwanted change in tone, try a tinted leave-in product such as Rita Hazan Foaming Color Gloss ($26; sephora.com). It will counter brassiness and help revive a faded hue.
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