Pros:
* Toning Highlights: Semi-permanent color is a great way to tone highlights that are too brassy, yellow, or orange. You can choose a toner with a violet or blue base to neutralize these unwanted tones.
* Adding Color Dimension: You can use a semi-permanent color that is close to your natural hair color to blend the highlights and create a more natural, dimensional look.
* Low Commitment: Semi-permanent hair color washes out over time, so if you don't like the results, they won't last forever.
* Less Damaging: Semi-permanent color doesn't contain ammonia or peroxide, so it's less damaging to your hair than permanent color.
Cons:
* May Not Cover Darker Hair: Semi-permanent color doesn't lighten hair, so it won't show up well on dark hair. It will only be visible on the lighter highlighted strands.
* Color Fading: Semi-permanent color fades with each wash, so you'll need to reapply it regularly to maintain the color.
* Uneven Results: If your highlights are uneven or brassy in some areas, the semi-permanent color may not cover evenly.
* Staining: Some semi-permanent colors, especially those with vibrant or dark pigments, can stain porous hair. Highlights, especially if they're damaged, can be more porous.
Here are some things to consider:
* Color Choice:
* To tone brassiness: Use a semi-permanent color with violet or blue undertones.
* To blend highlights: Choose a color close to your natural hair color.
* To add a fun color: Choose a vibrant semi-permanent color.
* Hair Condition: Semi-permanent color can be more readily absorbed on porous or damaged hair. If the highlights are already brittle or damaged, be cautious, and use a moisturizing treatment beforehand.
* Strand Test: Always do a strand test before applying the color to your entire head. This will allow you to see how the color will look on your highlights and ensure that you're happy with the results.
* Application: Apply the color evenly to your hair, focusing on the highlighted areas. Follow the instructions on the product packaging.
* Washing: Use color-safe shampoo and conditioner to help prevent the color from fading.
* Avoid Heat: Excessive heat styling can cause the color to fade faster.
In Summary:
Applying semi-permanent hair color over highlights can be a good way to tone, blend, or add a fun pop of color. Just make sure to choose the right color, do a strand test, and follow the instructions carefully. If you're unsure, it's always best to consult with a professional stylist.