Rahua is the brand here with the deepest roots. Fabian Lliguin, whose background is in hairdressing and coloring, and Anna Ayers, a New York fashion designer and trend forecaster, came upon rahua oil on trips to the rainforest, where women there make it. They launched the brand in 2008 wanting to honor the rainforest and its Indigenous people. The Rahua Color Full Hair Mask blends rahua, morete and blue tansy oils with lilac clay and a color-protection complex, and it is meant as a once-a-week treatment.

Pureology makes two conditioners here: Hydrate Conditioner for normal to thick, dry, color-treated hair and Strength Cure Conditioner for hair damaged by heat and color. Olaplex No.5 Bond Maintenance Conditioner eases detangling for medium to coarse hair, and Moroccanoil High Shine Gloss Mask is an in-shower treatment inspired by professional gloss services.

Crown Affair The Hydrating Conditioner uses coconut oil and sunflower-seed extract, RŌZ Foundation Conditioner is a creamy color-safe detangler with pea peptides and avocado oil, and R+Co Bleu Ingenious Thickening Conditioner gives fine hair instant body and bounce.

A timing tip: leave a mask on for the full time on the label, then finish with a cool rinse.

What I would skip: a clarifying or purple shampoo in the first week after a color appointment. Wait a couple of days before the first wash, and keep to gentle formulas that week.

Glosses are the step I would add when color looks flat before it has actually faded. Oribe Supershine Mirror Rinse Glass Hair Treatment is a one-minute rinse with the brand's Signature Complex of watermelon, lychee and edelweiss to help protect color. Kérastase Chroma Absolu High Shine Gloss Treatment is a rinse-out salon gloss that uses lactic acid to seal the hair surface, and Pureology Color Fanatic Top Coat + Clear Hair Gloss restores shine and vibrancy. OUAI Hair Gloss In-Shower Shine Treatment uses hyaluronic acid and rice water, and a pea-size amount from mid-lengths to ends is enough.

Leave-ins do the daily work. R+Co Bleu F-Layer Deep Conditioning Serum works on the protective lipid layer of the hair and uses sunflower seed oil for UV protection. Rahua Color Full Glossing Oil Mist goes on like the airiest mist with rahua, morete and sacha inchi oils. Virtue Frizz Block Smoothing Spray is heat-protective up to 450 degrees and safe for color-treated hair, and COLOR WOW Dream Coat is an anti-humidity blow-dry spray with chamomile extract to protect color.

A simple test: photograph your color in daylight the day after your appointment and again at week four, so you can see whether the gloss is helping.

What I would skip: hot tools without a heat protectant. Heat dulls color over time, so use the Virtue or COLOR WOW spray before every blow-dry.

Color fades a little with every wash, so the simplest fix is washing less. Try stretching to every other or every third day with a dry shampoo in between, and rinse with cool water. Keep a UV-protective leave-in or a hat on hand for long days in the sun, and use a heat protectant before every blow-dry or flat iron. Book a gloss between color appointments if your shade tends to turn brassy, and tell your colorist which products you use so they can adjust the formula to match. A few small habits make each appointment go further.