Adding depth and cool roots is the best approach to correcting unwanted warmth. If you only have unwanted warmth at your roots, then applying a colour with a bit more depth and cool tones at your roots only can correct
As for those lighter roots? A root touch-up kit (you can use one with permanent color—or temporary dye) will help deepen the shade until it's time to color again in six or so weeks.
Powder makeup such as eyeshadow or face powder (with some hairspray to help it stick) can lighten up or cover the roots somewhat. You can also buy sprays and products for root color. Or do the reverse and add in some temp low lights or darker streaks with these products to blend it better.
Use a purple or blue shampoo
Pick your toning shampoo based on the original colour of your hair before you applied the bleach. Blue and purple shampoos neutralise unwanted brassy tones to reveal a cooler blonde or light brown shade.
The best thing to do is to dye your hair again but with a natural shade. Dyeing in a natural shade, a colour ending in . 0, neutralises the bright hair colour. So if you have dyed your hair, for example, with our hair colour copper red light brown (6.64), choose the hair colour light brown (6.0), to dye it again.
Purple and yellow are opposites on the color wheel, which means they can be used to counteract one another. Since blonde hair that's turned brassy looks yellow, a pigmented purple shampoo can actually neutralize the yellow hue and take you back to the ashy blonde color you wanted in the first place.
Why does this happen? The lighter, warmer result at the roots which characterises hot roots can be seen; If you use a colour which is lighter than any older, darker pre-existing color on your mid-lengths or ends. This can lead to a lighter color result at your roots than the rest of the hair.
Root concealer sprays provide a user-friendly option, the aerosols functioning similar to the dry shampoos we've all come to rely on. Oribe Airbrush Root Touch-Up Spray offers oil-absorbing benefits with its boost of color, R+Co's Bright Shadows Root Touch-Up Spray is a highly blendable option that amplifies shine.
You really have three options for fixing your dark roots at home: leave them as they are and let your blonde grow out, lighten with bleach or soften with what the hairdressing world calls a Base Break. Because you're here, we definitely know we're not leaving them to grow out!
When it comes to blending dark roots with blonde hair, balayage and foilyage are two of the most popular choices. Balayage, a French term for 'sweeping', involves freehand painting of the dye onto your hair, creating a soft, natural transition from dark to light.
Using the right purple shampoo can eliminate brassiness and avoid additional damage to your hair from using a permanent color to tone. We often recommend Wella toners for eliminating brass and evening out color.
For that reason, figuring out how often you can dye your hair is a fine balance. As a rule of thumb, refrain from another treatment for 6 weeks if you can, and a minimum of 4 weeks. Semi-permanent hair color products are the exception to the rule and can be used more often than permanent tints if you want.
And secondly, as a blonde, your previously bleached lengths (even those close to your roots) are likely quite porous. This means they will soak the toner up quicker. Your roots, on the other hand, will be much less porous and therefore will not soak up as much of the toner.
And because those UV rays are stronger in summer compared to other times of the year, some strands will turn a copper red colour due to the underlying warmer tones in your brunette hair being revealed as it's bleached by the light. Suffice it to say, until new hair grows through, the reddish tint will remain.
"You want to stop using it two weeks before any lightening service. The purple shampoo can cause build up making the hair look dull and darker if overused." This makes the lightening process more difficult to create a seamless blend.
If you leave purple shampoo in your hair for 30 minutes, the risk of over-toning increases significantly. While purple shampoo is designed to neutralize brassy or yellow tones, leaving it on for an extended period can lead to overly cool or even purple-tinted hair, especially for those with light or porous hair.
Darken your highlights by applying toner and developer. For a quick fix, try using a colored dry shampoo or color-depositing shampoo to even out the tone. A gloss treatment, semi-permanent, or permanent hair color gives more drastic, longer-lasting results.