Choosing a new hair color can feel overwhelming when you’re comparing shades, formulas, and developers. Should you choose a warm brown or an ash brown? Can a lighter shade brighten previously colored hair? And what should you know before you start?
The best results begin with understanding your starting color and choosing a product suited to your experience. This guide explains how to choose a permanent hair color shade, prepare for application, and avoid common mistakes.
1. Decide whether permanent hair color fits your goal
Permanent hair color creates a lasting color change rather than simply washing away. Your roots will grow in with your natural shade, and the colored lengths can still fade or change tone over time.
It may be an option for covering gray, maintaining a consistent shade, or changing your natural color within a product’s stated capabilities. But permanent color isn’t a shortcut for every transformation. Going dramatically lighter, correcting uneven color, or changing previously dyed dark hair is best handled by a professional.
Explore our Hair Color & Professional Dyes collection to compare formulas. Check each product’s intended use before buying: professional color and at-home kits are not interchangeable.
2. Choose your shade by depth and tone
Start by looking at your roots and lengths in natural light. Note your natural shade, any existing color, and areas of gray. Previously lightened ends may respond differently from untreated roots.
Depth describes how light or dark a shade is. Tone describes its character, such as golden, copper, ash, or neutral. Two shades can have a similar depth but look very different because of their undertones.
For a subtle change, look for a shade close to your current color and within the manufacturer’s recommended range. Warm tones offer a golden or reddish appearance, while cool tones lean ashier. Neutral shades aim for a more balanced result.
Use the specific brand’s shade chart rather than assuming that shade numbers mean the same thing across every range. Your starting color matters more than the photograph on the packaging.
If you’re covering gray, check the formula’s gray-coverage instructions. Don’t assume that every shade or color type offers the same coverage.
3. Understand the formula before choosing a developer
Some home-color kits include their developer. Other products are color only and require a separately purchased, compatible developer.
Never choose a stronger developer simply because you want a brighter result. The correct developer, mixing ratio, and processing time depend on the exact formula and your starting hair.
For example, Wella Color Charm Permanent Gel Haircolor and Wella Color Tango Permanent Masque Haircolor have different mixing instructions. Their directions should not be swapped.
You can also explore L’Oréal Technique Preference Permanent Hair Color, checking the package for its intended user, compatible developer, and complete instructions.
Wella Color Charm Permanent Gel is labeled for professional use only. If you’re coloring your own hair without professional training, choose a product explicitly intended for home use instead.
4. Complete the safety checks before application
Read the entire instruction leaflet before opening or mixing your color.
Perform the manufacturer’s allergy alert test before every application, at the interval specified on the packaging, even if you’ve used that color before. A previous reaction-free application does not guarantee you won’t react later.
Also perform a strand test according to the directions. This helps you assess the likely shade and how your hair responds. A strand test does not replace an allergy alert test.
Do not color an irritated or damaged scalp. If your hair is breaking, heavily processed, or has an uncertain history of previous dyes, consult a professional first. Never use scalp hair dye on eyebrows or eyelashes.
5. Prepare your space and apply as directed
Set out the items required by your home-use product, including gloves, a timer, protective clothing, and any approved application tools. Protect nearby surfaces and work in a well-ventilated space.
Follow the product’s preparation instructions, including whether hair should be dry or damp and whether it should be washed beforehand.
Mix only as directed and use the mixture promptly. Do not combine different brands or formulas unless the manufacturer explicitly permits it.
Application order matters. A first-time application and a root touch-up may require different approaches, so follow the instructions for your situation. Work in manageable sections for even coverage, and avoid repeatedly overlapping permanent color onto previously colored lengths unless directed.
Use a timer and follow the stated processing time. Leaving color on longer is not a reliable way to improve the result. If you experience burning or a reaction, stop and follow the product’s safety instructions; seek urgent medical help for breathing difficulties or facial swelling.
6. Rinse, condition, and protect your color
Rinse and condition exactly as instructed. Discard leftover mixed color according to the packaging directions; never save it for another application.
For ongoing care, choose shampoo and conditioner formulated for color-treated hair and suited to your texture. Limit unnecessary heat exposure and follow your styling tool’s guidance.
Keep a record of your shade, product, and application date. It makes future maintenance easier and gives your stylist useful information if you decide to change your color.
7. Know when to call a professional
Permanent dye generally does not reliably lighten previously dyed hair. Applying a lighter shade over dark artificial color can leave you disappointed or uneven.
If your result is too dark, patchy, or unexpectedly warm, resist immediately applying another permanent color. A professional can assess your hair’s condition and plan the next step.
The right hair color starts with a realistic goal, a suitable formula, and careful preparation. Browse our hair color collection, check each product’s directions, and choose professional help whenever the transformation is more complex than a straightforward home-use application.