Wella Koleston Perfect 4/0 Medium Brown/Natural Permanent Color / 2 oz.
Schwarzkopf Professional IGORA 4/0 Medium Brown. Achieve rich, natural-looking medium brown results with this foundational shade from the IGORA permanent color line. Designed for professional colorists, 4/0 reliably delivers full coverage and depth, making it a go-to choice for both standalone applications and custom blending. The balanced neutral base provides consistent, predictable outcomes across varying hair textures.
Quick Take
This medium brown shade offers reliable coverage and a true-to-tone finish for professional color services. Ideal for root touch-ups, all-over color, and gray coverage, it pairs seamlessly with other IGORA shades for customized formulations.
- Neutral medium brown without warmth or cool cast
- Excellent gray coverage for consistent results
- Balanced for natural-looking color removal lift
- Versatile base for mixing with other IGORA shades
- Professional-grade emulsion compatibility
- Delivers even color deposition on all hair types
Why Pros Choose It
Schwarzkopf Professional's IGORA collection is a staple in salons worldwide, and shade 4/0 Medium Brown represents the reliable neutral you can build any formulation around. Colorists value its predictable lift and deposit behavior, which reduces the need for corrective services. The 4/0 is especially favored for its ability to cover gray hair completely while maintaining a natural, non-ashy finish that suits a wide range of skin tones.
Key Benefits
From first-time colorists to experienced technicians, 4/0 delivers the consistency required for high-volume, repeat color services. Its formulation supports both standard application and advanced color correction workflows.
- Neutral undertone prevents unwanted red or green casts in finished color
- Full gray coverage means fewer callbacks for patchy results
- Consistent lift when used with appropriate developer strengths
- Low-ammonia option available within the IGORA system for gentler services
- Blendable with warm or cool shades for customized results
- Long-lasting color retention reduces client touch-up frequency
- Excellent coverage on resistant gray hair zones
Features That Matter
IGORA 4/0 builds on Schwarzkopf's proprietary color technology to deliver professional outcomes. Each feature supports efficiency and consistency during service.
- Neutral base 4/0 — acts as a balancing shade without adding warmth or cool tones
- Permanent color formula — provides lasting results that fade on tone
- Compatibility — mixes with all IGORA developer strengths (3%, 6%, 9%, 12%)
- Even absorption — reduces splotchy or banded results on porous hair
- Scalp compatibility — suitable for use on sensitive scalps when mixed with low-strength developer
- Versatile mixing ratio — works 1:1, 1:2, or custom ratios depending on applied technique
How to Use
Apply to dry, unwashed hair for optimal results. Do not dilute or mix with non-IGORA products to preserve performance.
- Select appropriate developer strength (3% for deposit only, 6% for 1–2 levels lift, 9% for 2–3 levels lift)
- Mix 4/0 with chosen developer at 1:1 ratio in a non-metallic bowl
- Apply evenly from roots to ends using brush and bowl or applicator bottle
- Process for 30–45 minutes at room temperature
- Rinse thoroughly with lukewarm water until water runs clear
- Shampoo with color-safe shampoo, followed by conditioning treatment
- For gray coverage, focus application on resistant root areas first
- Always perform a patch test 48 hours prior to service
Specs & Details
Designed for professional use only, this permanent hair color comes in standard tube sizing compatible with all IGORA developers and accessories.
- Brand: Schwarzkopf Professional
- Product Line: IGORA
- Shade Number: 4/0
- Color Description: Medium Brown
- Color Type: Permanent
- Professional Use Only: Yes
Pro Tips
Use these operational insights to maximize 4/0 performance at your station.
- Mix 4/0 with 6% developer for standard gray coverage and 1–2 levels of lift
- On coarse gray hair, extend processing time to 45 minutes for full saturation
- For natural color correction, blend 4/0 with quarter amounts of warm or cool shades
- Use 4/0 as a neutralizer when brown shades appear too warm after processing
- Store tubes upright in cool, dark conditions to prevent separation
