The right L'Oréal brown is the one that sits one or two levels from your current color, matches your undertone and fits the amount of gray you have. For most people in the US, that means reading the number on the box (4 is dark brown, 5 is medium brown), checking the reflect after the number, and choosing permanent color if gray is a big part of the picture. Below, I walk through the shade system, the product types, gray coverage, why a box can turn orange, and how to keep the color looking good.
TL;DR
- The first number on a L'Oréal box is the depth: level 4 is dark brown and level 5 is brown. The number or letter after it is the reflect, or tone.
- Choose a shade one to two levels up or down from your current color, then match golden reflects to warm undertones and ashy ones to cool undertones.
- Excellence Crème is made for up to 100% gray coverage; gloss and semi-permanent formulas suit first grays only.
- Do the allergy alert test 48 hours before every application, and expect to touch up roots every 4 to 8 weeks.
Table of Contents
- What L'Oréal brown hair color actually covers
- What the numbers on the box mean
- How to choose your brown
- Gray coverage: which formula to pick
- Why brown dye can turn orange
- Applying it safely
- Keeping brown looking fresh
- Our perspective: color is only one part of hair health
- Track your hair before and after you color
- FAQ
- Sources
What L'Oréal brown hair color actually covers
When people search for L'Oréal brown, they usually mean one of two things: a specific box on a store shelf, or a general idea of which brown suits them. The brand's range covers both. L'Oréal Paris sells permanent, semi-permanent and temporary color, including root cover-up sprays and powders, so "brown" is not one product. It is a color family spread across several formulas.
Here is how I think about the three types:
- Permanent color is for real gray coverage and lasting change. It is the formula behind most of the brown boxes you see in drugstores.
- Semi-permanent color and gloss is for blending early grays or adding shine. It suits you if you want a subtle shift rather than a commitment.
- Temporary products such as root sprays and powders are for bridging the gap between full colorings.
Within permanent color, the Excellence Crème range includes brunette shades such as 4 Dark Brown and 5 Medium Brown, along with ash, golden and reddish-brown reflects. The UK range also lists a shade called 3 Natural Darkest Brown, which shows how far down the depth scale the brand goes.
My honest advice: decide the type first (permanent or gloss), then the depth, then the tone. Most box disappointments come from skipping that order.
What the numbers on the box mean
L'Oréal uses an international numbering system, and the company says it is used in over 150 countries so shades can be chosen across language barriers. Once you can read it, shopping gets much faster.
The first number: depth
The number before any decimal is the base level, running from 1 (black) to 10 (the lightest blonde). Brown lives in the lower middle of that scale:
| Level | Description | Typical box name |
|---|---|---|
| 1 | Black | Black |
| 3 | Darkest brown | Natural Darkest Brown |
| 4 | Dark brown | 4 Dark Brown |
| 5 | Brown / medium brown | 5 Medium Brown |
| 10 | Lightest blonde | Very light blonde |
This answers two of the most common questions directly. Dark brown is number 4. Medium brown is number 5. If you want a deeper, nearly black brown, look at 3. If you want a lighter chestnut or caramel, you are moving up the scale toward 6 and 7, and the box will name the shade.
The second number: the reflect
The digit after the decimal, or the second number, is the reflect. It tells you the tone the color leans toward, such as ash, gold or red. Two boxes can both be level 5 and look quite different because one is neutral and one is golden.
Professional colorists use this for correction too. L'Oréal's Italian professional guide explains that adding .2 or .1 can counter yellow or orange tones. That is useful to know even at home: if you keep ending up warmer than you want, look for an ashier reflect next time.
Brown itself is a neutral. L'Oréal's training material describes it as formed from equal parts of the three primary colors: blue, red and yellow. That balance is why a brown can drift warm or cool so easily when your hair has a strong underlying pigment.
If you want a longer explainer on this system, we have one on the hair color numbering system.
How to choose your brown
Two things decide whether a brown looks natural on you: where you start and what your skin undertone is.
Start within two levels
L'Oréal's guidance is to pick a shade one to two levels above or below your current color for the best result. I would treat that as a rule, not a suggestion. A level 4 going to a level 5 is a gentle step. A level 2 going to a level 6 is a lightening job, and a box is poorly equipped for that.
Check your undertone
The same L'Oréal page gives two simple checks: vein color (green suggests warm, blue suggests cool) and jewelry preference (gold suggests warm, silver suggests cool). It adds that warmer undertones may prefer golden reflects, while cooler undertones may suit ashy or pearlescent shades.
In practice:
- Warm undertone: look for golden brown, caramel or chestnut reflects.
- Cool undertone: look for ash brown or cooler, deeper browns.
- Neutral undertone: you can wear most browns. Choose by depth and by how much maintenance you want.
L'Oréal Paris also publishes a guide to brown shades by skin tone, but the vein and jewelry checks above are the quickest way to narrow it down before you open it.
A quick decision path
- Name your current level (dark, medium or light).
- Pick a target within one or two levels.
- Pick the reflect to match your undertone.
- Choose permanent for gray coverage or a gloss for a softer change.
- Read the full instructions and do the allergy test before buying more than one box.
Gray coverage: which formula to pick
Gray is where the product type matters most. L'Oréal's own guidance is that permanent color is better for hair with more than 40% gray, while under 40% you may get by with semi-permanent or gloss.
Excellence Crème is the permanent option the brand points to. Its US product page describes a formula enriched with hyaluronic acid, designed for 100% gray coverage while protecting the hair fiber. For first grays, the brand's guide names Casting Crème Gloss as a blending option.
A few practical notes from me:
- "100% coverage" is a brand claim about the formula. How it looks on your head still depends on your starting color and the shade you choose.
- Stubborn gray often looks best in a shade that is not too far from your natural depth. A level 4 or 5 usually reads as believable brown.
- If your hair has gone fully white and you are weighing options beyond dye, our piece on white hair solutions covers the wider picture.
Why brown dye can turn orange
One of the top results for this keyword is a forum thread from someone whose dark hair turned completely orange after using a light brown box. It is a common story, and the cause is rarely a bad product.
L'Oréal explains that previous color and your starting color both affect the result. When you lighten hair, warm red or orange undercoats can show through, and going more than two levels lighter can emphasize strong undertones.
So if you have dark hair and pick a much lighter brown, orange is the predictable outcome. To lower the risk:
- Stay within two levels of your current color.
- If you have old dye in your hair, expect it to behave differently from virgin hair.
- Choose an ashier reflect if you tend to run warm.
- For a big jump in depth, see a colorist rather than stacking boxes at home.
If you are already orange, resist re-dyeing the same night. A colorist can use the tone system to neutralize it, and a second box applied in a panic can add damage on top of the color problem.
Applying it safely
Safety first, because hair dye is a chemical product. L'Oréal's instructions say to read the leaflet and do an allergy alert test 48 hours before each application. Each application means every time, even if you have used the same box before. Wear the gloves provided and cover your shoulders.
If you get a reaction on the test patch, do not color your hair. See a doctor or an allergist, and take the box with you.
For timing, the instructions for first-time color, or color after more than three months, are to apply to the roots first, then spread through the lengths and ends, for a total development time of 30 minutes. Root touch-ups follow a different timing on the leaflet, so check which one applies to you. L'Oréal also publishes step-by-step Excellence Crème application instructions if you prefer to follow along.
Keeping brown looking fresh
Permanent color grows out, so maintenance is part of the deal. L'Oréal notes that high-contrast changes need more frequent touch-ups than shades close to your natural color. That is another reason to stay within a level or two.
For aftercare, the Excellence kit includes a post-color shampoo and a lightweight mask, and the brand also points to Elvive Colour Protect. The same product page suggests touching up when grays show, typically every 4 to 8 weeks.
My routine suggestions:
- Use the included post-color care after every color, not just the first.
- Wash less often if your scalp allows it.
- Touch up roots only, rather than pulling color through the lengths every time.
- Keep a photo of your roots each month so you can judge when it is actually time.
Our perspective: color is only one part of hair health
We built MyHair around a simple belief: most people choose hair products by guessing, and hair deserves better data. Color is a good example. People pick a brown by the picture on the box, then discover too late that their starting level, undertone or thinning pattern changes the result.
We see color decisions sit inside a bigger question: what is your hair doing over time? If you are coloring more because of thinning, a widening part or visible scalp, a darker shade may hide the issue for a while, but it does not tell you what is going on. Tracking change with regular scans gives you a baseline, so you can see whether density, texture or shedding patterns are moving in a direction you care about.
Our advice is to treat dye as a cosmetic choice and hair health as a separate one. Pick the brown you love, follow the instructions, do the allergy test, and keep an eye on what happens to the hair underneath. If you notice sudden or patchy shedding, see a dermatologist or a hair restoration doctor rather than trying another box.
— Cyriac
Track your hair before and after you color
If you are about to change your color, we suggest taking a baseline first. The MyHair app analyzes your hair from a scan, tracks change over time and gives tailored product recommendations. You can start on the free plan, and the paid monthly plan is $9.99 per month on the subscription page.
If thinning is the reason you are reaching for color more often, we also list hair clinics and hair restoration doctors in our directory so you can talk to a specialist.
FAQ
What number is L'Oréal dark brown hair color?
Dark brown is number 4 in the L'Oréal system, and level 5 is the brown or medium brown. In the Excellence Crème range, they appear as 4 Dark Brown and 5 Medium Brown. The number after the decimal, where there is one, is the reflect.
What number is L'Oréal medium brown?
Medium brown is number 5 on Excellence Crème, sold as 5 Medium Brown. Check the reflect to see whether it leans ash, golden or red. Stay within one or two levels of your current color for the most predictable result.
Which brown is best for gray hair?
A permanent color is the better choice when you have more than 40% gray, and Excellence Crème is made for up to 100% coverage. A shade close to your natural depth, often a 4 or 5, tends to look the most believable. For just a few grays, a gloss can blend them instead.
Which brown hair color is best overall?
There is no single best brown. It depends on your starting level and your undertone: golden reflects for warm undertones, ashy or pearlescent for cool. Use the vein and jewelry checks, then pick a shade within two levels of where you are now.
How often do I need to redo my brown?
The brand suggests every 4 to 8 weeks, once grays or roots show. A bigger change from your natural color usually means touching up sooner.
Sources
- Explore All Hair Color & Hair Dye Products, L'Oréal Paris
- Excellence Crème Permanent Gray Hair Coverage Hair Color, L'Oréal Paris
- Hair Colour Training manual, L'Oréal Group
- Hair Colour Numbering System, L'Oréal Professionnel
- Numerazione colore capelli, L'Oréal Professionnel Italia
- How Hair Colouring Works, L'Oréal Paris
- Our Best Dyes for Grey Hair, L'Oréal Paris
- Excellence Creme 3 Natural Darkest Brown, L'Oréal Paris
- How To Dye Hair with L'Oréal Excellence Crème
- Hair color, L'Oréal Paris beauty magazine