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How to Get Mushroom Brown Hair Color at Home: The Complete DIY Guide

The cool-toned brunette that’s taking over salons. Here’s how to do it yourself.

Mushroom brown is the most requested hair color in salons right now — and for good reason. It’s cool-toned, dimensional, and works on virtually every skin tone. A salon visit costs $150-300. Doing it at home costs $20-40 in supplies and about 2 hours of your time. The catch: you need to understand the chemistry to avoid turning your hair orange. Here’s the step-by-step.

Step 1: Assess Your Starting Color

⏱ 10 minutes

Your starting color determines everything. Mushroom brown is typically a level 5-7 (medium to light brown) with cool undertones. If your hair is already in this range, you mainly need to neutralize warmth. If it’s darker, you’ll need to lighten first. If it’s lighter, you’ll need to add depth. Check your current level in natural light — indoor lighting lies. If your hair is level 1-4 (black to dark brown), you’ll need to lighten 2-3 levels before applying mushroom brown toner. If it’s level 5-7, you can go straight to toning. If it’s level 8+ (light blonde), you’ll need to add a warm base first or the result will be too ashy.

Step 2: Choose Your Formula

⏱ 10 minutes

The mushroom brown formula depends on your starting level. For level 5-7 hair (medium to light brown): use a cool-toned brown dye (look for ‘ash brown’ or ‘cool brown’ on the box — brands like Wella, Ion, or L’Oreal Excellence have specific cool-brown shades). For darker hair: you’ll need a bleach or high-lift color to lighten first, then tone with an ash-brown toner. For lighter hair: use a demi-permanent cool-brown one level darker than your target to add depth. The key ingredient is ‘cool’ — any dye with ‘warm,’ ‘golden,’ or ‘red’ in the name will not give you mushroom brown.

Step 3: Prepare and Apply

⏱ 30-40 minutes

Section your hair into 4 quadrants (top-left, top-right, bottom-left, bottom-right). Mix your dye according to the instructions — typically 1:1 ratio of color to developer. Start with the bottom sections first (they process slower because they’re farther from the scalp heat). Apply dye to 1-inch sections, saturating from root to end. Don’t rush — uneven application means uneven color. Once all sections are covered, set a timer for the recommended processing time (usually 25-35 minutes for permanent dye, 15-20 for demi-permanent). Don’t leave it on longer than recommended — over-processing damages hair and can shift the tone.

Step 4: Rinse, Tone, and Condition

⏱ 20 minutes

When the timer goes off, rinse with lukewarm water until the water runs clear. Don’t use shampoo yet — the color needs 48 hours to fully set. If the color isn’t cool enough after rinsing, apply a purple or blue toner (like Wella T18 or T14) for 10-15 minutes to neutralize any remaining warmth. This step is optional but recommended if you see any orange or golden tones. After rinsing the toner, apply a deep conditioner or color-safe mask and leave it on for 5 minutes. This closes the cuticle and locks in the color.

Step 5: Maintain the Tone

⏱ Ongoing

Mushroom brown fades — all cool tones do. The maintenance routine: use purple shampoo once a week to neutralize any warmth that creeps in. Use color-safe conditioner every wash. Avoid hot water (it opens the cuticle and lets color escape). Use heat protectant before any hot tools — heat oxidizes color and shifts it warm. Sleep on a silk pillowcase to reduce friction-based color fading. With this routine, your mushroom brown will stay cool for 8-12 weeks between touch-ups. Without it, you’ll see warmth creeping in within 3-4 weeks.

Why This Works: Mushroom brown works by using the color wheel in reverse. Orange and yellow (warm tones) sit opposite blue and violet on the color wheel. By applying a blue or violet-based (ash) dye, you’re neutralizing the warm undertones that naturally exist in brown hair. The result is a cool, muted brown that reads as sophisticated rather than warm and golden. The chemistry is simple — the execution requires the right formula.

Mushroom brown is the color that proves brunettes have more fun — they just do it quietly. While blondes fight brassiness and redheads fight fading, mushroom brown sits in its cool lane and looks effortlessly expensive. Get it right, maintain it properly, and you’ll have the most asked-about color in any room.

Get your formula. Set your timer. Welcome to the mushroom side.