Why All Bottle Blondes (And Brunettes and Redheads!) Need a Color-Depositing Conditioner

Add a few pumps of Evo's Mahogany tone to your mid-lengths and ends to instantly take those faded highlights to a rich chocolate tone.

When your deep brown hue starts to take on a certain shade of orange, apply a layer of Christophe Robin's Shade Variation Care Mask in Ash Brown. The cool blue pigments used in the formula counteract any brassiness to keep your brunette Kate Middleton-levels of rich.

When your shiny noir hue starts to fade, your best bet would be to go for the darkest, coolest brown color conditioner possible, like DP Hue's Color Boosting Gloss in Dark Brown/Black, as choosing a solid black tone would give off too much an obvious inky appearance.

Are your formerly-honey strands quickly approaching platinum after too much time in the sun? Lather, rinse, and run a dollop of Shu Uemura Art of Hair Color Lustre in Golden Blonde ($58; barneys.com) through your wet layers to give your hue a subtle touch of warmth.

Especially if you start with a dark natural base, cool blonde tones run a serious risk of going brassy real quick. Counteract the orange and warm yellow hints with a purple conditioner like Drybar's Blonde Ale Brightening formula—the violet pigments actually help to neutralize all of the unwanted shifts in shade.

Because red has the largest color molecule, it slides out of the hair shaft much easier than its blonde and brunette counterparts, making the shade more prone to fading. Make sure to use a flame-toned conditioner like Davines' Alchemic formula in Copper to keep your true auburn hue vibrant.

Fact: one bottle of Joico's blue-based true red will last you forever—the color is super-saturated, so just a little bit goes a long way to keep your Jessica Rabbit-esque hue pristine.

Aside from red, unconventional colors like pastel pink, neon blue, or aquamarine can be the hardest of the spectrum to keep looking fresh. Luckily, Overtone Haircare contains conditioners and treatment masques ($45 each; overtone.co) in every shade of the rainbow, silver included. Another DIY remedy? Cut your favorite conditioner with the smallest amount of Manic Panic ($14; manicpanic.com), shake well, and apply with abandon.