Kendall Jenner Reveals She’s Never Done THIS Major Beauty Treatment

DO: USE A TEMPORARY COLOR BEFORE A PERMANENT ONE

As much as you may have a certain shade in mind, celebrity colorist and co-founder of dpHUE Justin Anderson recommends testing the waters first with a semi-permanent version. "It will gradually wash out after multiple shampoos," he explains. "Permanent color lasts much longer and will most likely require you to see a professional to get it fixed if something goes wrong." By starting with a semi-permanent dye, you'll be able to save yourself any hassle if it turns out you're not as big of a fan as you thought. (Photo via Charisse Kenion/Unsplash)

DON'T: LIGHTEN YOUR HAIR MORE THAN TWO SHADES AT A TIME

When you shift your hair more than two shades in a single session, it can be seriously damaging to your strands — not to mention unsightly. "Permanent color is typically formulated to lighten approximately two levels," explains David Stanko, vice president of technical design and education at Madison Reed. "If you try to bend this rule, the dyes will not be able to control the additional undertones exposed, and the result will be a color that is too warm or red, AKA brassy." If you want to lighten more than two shades, schedule multiple days (spaced a couple of weeks apart) to get the job done so your hair stays as healthy as possible. (Photo via Mathilde Langevin/Unsplash)

DO: PICK A COLOR THAT COMPLEMENTS YOUR COMPLEXION

A flattering hair color is one that neither washes you out nor makes you look older than you really are. To figure out which shade best suits your complexion, take NYC-based Eddie Arthur Salon colorist Christine Neos' advice. "Hold a silver foil up to your face (representing ash tone), followed by a gold foil (representing gold tone)," she instructs. "You'll be able to see which reflects better on your skin." (Photo via Vladimir Yelizarov/Unsplash)

From there, remember that opposites attract. "In the hair color world, this means that you should not pick a shade that matches your skin's undertones," advises Stanko. "For instance, if you have pink or warm undertones and choose a copper color, the combination of reds becomes overwhelming and your skin will look blotchy. For cool skin tones, a super-cool hair color will just wash you out to ghost land."

DON'T: CHOOSE A COLOR SOLELY BASED ON THE PICTURE ON THE BOX

Imagine having to wear a single dress every day for months at a time. Would you select it solely based on how it looks on the mannequin? Not a chance. The same goes for your hair tint. "What's pictured on the front of the box may not necessarily be the color that you are going to achieve," Anderson says. "It's important to pay attention to both the shade and the tone. Keep in mind that the color can be affected by any dye or treatments you may already have. If you are unsure about the color you should use, always lean towards something on the lighter side because you don't want to end up with a dark band in your hair."

Or, forget the front of the box altogether. Turn it to the side, which usually contains pictures showing what the result will be based on your current hair color. You could even head to Walmart, Walgreens, Wakefern, and Meijer to use Garnier's Shade Selector Tool. It allows you to virtually try on the entire range without ever touching your tresses.

DO: TOUCH-UP YOUR ROOTS WITH A ROOT PRODUCT

Selecting the right shade (and formula) for your roots is critical. "It's best to choose a product specifically designed to be a root touch up [like Revlon Root Erase ($10) or Clairol Root Touch-Up Semi Permanent Color Blending Gel ($10)]," says Revlon global master colorist Miquel Garcia. "If you use a traditional all-over permanent product, the color is likely going to be a darker, more vibrant color [since it's designed for your entire head as opposed to an in-between touch-up]. Root-specific products are designed [to be a bit lighter] to mimic your lengths and ends approximately two weeks after your last color."

That's not to say it's impossible to conceal your roots with regular hair dye, but Garcia notes that it can lead to more damage since you have to blend it down your mid-lengths and ends. To avoid any negative effects, he says the best and safest way to get your closest shade match is to apply the color allover but only leave it on for five minutes so it's less likely to wreak any havoc.

DON'T: DYE DAMAGED HAIR

While the process can revive lackluster color, it won't do anything for strands not in workable conditions. "When [strands are] split, dry, and damaged, the follicle is compromised and misshaped," says Courtney Goebel, the client education lead at eSalon. "Imagine a microscopic close-up of a single strand of hair. If healthy, the follicle will appear round and smooth. If damaged, it will look frayed, twisted, and wheat-like." Applying dye to the latter can be pretty tricky since it wont be able to absorb evenly. "This will cause an uneven, spotty shade, as still-healthy parts of the follicle may take in dye, while damaged parts are left uncolored," she says. (Photo via Valeriia Kogan/Unsplash)

DO: CHOOSE PRODUCTS FROM THE SAME BRAND

It may not seem like a big deal to combine a variety of brands together, however, when it comes to your tresses, it's best to take extra precaution and stick to just one collection. According to Stanko, hair color manufacturers create their products to specifically work together in a way that's healthy for your mane. He explains that when you mix one brand of color with a different brand of developer, you risk too-thick or too-thin formulas that won't evenly distribute throughout your strands. "Whether it's balance or viscosity that's off, it can lead to unpredictable color results," he says.

DON'T: LEAVE THE DYE ON FOR TOO LONG

As with most beauty treatments, leaving hair dye on your head for longer than recommended is never a good idea. "Timing is very important," Goebel says. "If a color has not been left on long enough, there is the possibility that your roots may be lighter (or darker) than your ends, your color won't come out as imagined, or your grays won't be covered." While most permanent solutions eventually stop processing at about the 40-minute mark, Goebel points out that leaving it on past that can actually lift the shade, causing what's known as hot roots, where that area gets lighter and doesn't match the rest of your head. (Photo via Adam Winger/Unsplash)

DO: CONSIDER THE BIGGER PICTURE

Sit down and listen up, because here's the real deal when it comes to at-home hair color. "Whenever you color your hair, consider time, cost, potential damage, and maintenance/frequency of coloring," Stanko advises. "The farther you travel from your natural shade, the more time it will take, the more it'll cost, the greater the potential for damage, and the more often you'll need to [dye] your hair." At the end of the day, you can't go from blue black to icy blonde without taking all these factors into account. "Social media has fooled us into thinking drastic color changes are easy, but remember that celebrities have a whole beauty squad behind them," he says. "When you see them [switching up their strands] a few weeks apart, you don't see all the energy, effort, expertise, hair extensions, and even photo filters that go into the look. Social media pictures might tell a story, but they never tell the whole story."

Ross and Rachel from Friends

Friends is one of the most iconic sitcoms of all times, and Ross and Rachel is definitely one of the most devastating TV breakups. In season 3, this iconic couple decides to take a break in and in "The One with the Morning After," Ross wakes up with another woman named Chloe at the exact moment Rachel shows up at his door. Rachel finds out about the affair, and after a fight in Monica's living room, the couple calls it quits.

Regardless of how you feel about Ross claiming they "were on a break" when he slept with Chloe, seeing Rachel's reaction (and knowing the trust between them was broken) is one of the worst moments in the whole show. Just thinking about it makes my stomach bottom out!

Rory and Jess from Gilmore Girls

This is one of my personal most-devastating TV breakups because it seems like, out of all of Rory's boyfriends, Rory and Jess are just perfect for each other when they start dating. Not only does their love of books bring them closer together, but their personalities are so compatible. But when Jess leaves for California at the end of season 3 — without saying anything to Rory, I might add — is unacceptable! It breaks my heart, and based on the final look he gives Rory during A Year in the Life, he also regrets it BIG TIME.

Damon and Elena from The Vampire Diaries

This Vampire Diaries couple was truly endgame, and the will-they-won't-they of it all was one of my favorite things about the show. So when they broke up (to my horror), I was devastated.

Damon and Elena admit they're bad for each other in the season 5 episode "While You Were Sleeping" (then Damon tells her he doesn't even want to be friends. Ouch!!), but it's the season finale, "Home," that makes me extra emotional. When Damon gets stuck with Bonnie on the Other Side, he says goodbye to Elena, who's begging him not to leave but can neither see nor hear him. Say it with me: gut! wrenching!

Conrad and Belly from The Summer I Turned Pretty

The Summer I Turned Pretty fans are PASSIONATE about whether they're team Conrad or team Jeremiah (trick question, my OTP is Taylor and Stephen), and even the most dedicated Conrad stan hates the prom scene. You know, when he breaks up with Belly at her prom, in the rain. I know he just thinks Belly deserves better, but it's still very painful to watch.

Schmidt and Cece from New Girl

When I hear "devastating TV breakup" I IMMEDIATELY think of Schmidt and Cece from New Girl. Schmidt gets away with a lot of ridiculous things throughout this show, but dating two girls at one time is not one of them. After Nick has a hard time keeping Schmidt's love life a secret, Schmidt finally comes clean to Cece in "Double Date," leaving both her and me in tears. No matter how many times you rewatch the show, it truly feels like their relationship (and maybe even the friend group) will never recover.

Fleabag and The Priest on Fleabag

In the history of TV, I don't think I've ever heard anything as heartbreaking as "I love you," "It'll pass." Like, who approved that line?! The viral moment comes at the end of the Fleabag series finale, when Fleabag is sitting with The Priest at the bus stop. Over the course of the series, we not only see how much these two care about each other, but how well they know each other (like how The Priest recognizes when Fleabag zones out). To be loved is to be known, and that's what makes this devastating TV breakup even more devastating.

Carrie and Aidan on Sex and the City

After so much back and forth, it's hard to accept Carrie and Aidan's final breakup on SATC. But in season 4's "Change of a Dress," Carrie realizes she's not ready for marriage and Aidan realizes he doesn't trust her after her affair with Big. The combo of broken trust and being at two different life stages makes this extra painful to watch, and I don't think any amount of rewatches (or And Just Like That binges) is going to change that.