Colour and Pigment Theory

Why Colour Knowledge Changes Everything

Pigment selection is the decision most technicians get wrong the most often. Not because they lack skill, but because they choose colour by eye in the moment without understanding what the pigment will do inside the skin over time. A colour that looks perfect when it comes out of the cap may heal two shades lighter, shift orange within a year, or fade into an ashy grey that no client agreed to.

Estimates place the global permanent makeup market at over $2–2.6 billion, with eyebrow procedures dominating the industry and accounting for the largest share. As the industry grows, so does the volume of correction work. Industry data shows that approximately 10% of all new PMU clients are seeking corrective work from previous poor results, and colour problems account for the majority of those cases. Understanding pigment science is not a nice addition to your practice. It is how you avoid becoming the reason someone needs a correction.

This module teaches you the reasoning behind colour selection so that your choices become predictable, not hopeful.

What PMU Pigment Actually Is

PMU pigments are suspensions of colourant particles in a carrier solution. Unlike traditional tattoo inks, which are designed for deep dermal placement and long-term permanence, PMU pigments are formulated for the upper dermis and are designed to fade over one to three years depending on technique, skin type, and pigment composition.

There are two broad categories of colourant used in PMU pigments: inorganic and organic.

Inorganic pigments are mineral based. Iron oxides are the most common. They produce browns, taupes, and ochre tones and are generally considered stable and predictable. They do not fade into unusual colours and are the standard for eyebrow work. Iron oxides are regulated in most markets, and reputable pigment brands such as Perma Blend, Tina Davies, and Li Pigments use them as their primary colourant.

Organic pigments are carbon based and include a broader range of tones including cool greys, blacks, and some red-based browns. They can be more vibrant but are generally less stable over time. Some organic pigments have been restricted in certain markets due to EU cosmetic regulation updates in 2022, which banned several azo dyes and blue and green pigments containing specific compounds. If you work in or ship to European markets, verify your pigments against the current EU-approved list before purchasing.

Titanium dioxide (TiO2) is used in many pigments to lighten and soften tone. It is also one of the most stubborn pigments to remove. It reflects laser light rather than absorbing it, which means laser removal will not break it down effectively. This is critical to understand when correcting old work. Brows that appear light or ashy often have a high TiO2 content, which is why saline removal is frequently the better first step for correction rather than laser.

How Skin Affects Colour

Pigment does not sit on the skin. It sits inside it. The skin itself is a filter, and different skin tones, depths, and conditions filter colour differently.

The Fitzpatrick scale classifies skin into six types based on melanin concentration. This is the most practical tool for predicting how pigment will read once healed.

Fitzpatrick I and II (very fair to fair, burns easily): Skin has low melanin and provides less natural filtering. Pigments will heal slightly lighter and can appear cooler in tone. Clients may see more of the base tone of the pigment. Warm, slightly deeper tones often work well because they compensate for this natural lightening effect.

Fitzpatrick III and IV (medium to olive, tans easily): The most common client presentation in the UK market. These skin tones have moderate melanin that can add a yellowish warmth to pigment. Neutral to warm brown tones work well. Avoid cool-heavy mixes as they may heal ashy or greenish over time — warm pigment components (particularly red and yellow iron oxides) tend to fade faster than cooler tones, which can leave the residual colour appearing flat or grey-green on Fitzpatrick III/IV skin.

Fitzpatrick V and VI (dark to very dark, rarely burns): High melanin concentration significantly filters cooler pigments and can make certain shades appear to disappear into the skin once healed. Deeper, warmer, and more saturated pigments are generally required to achieve visible results. Carbon-heavy blacks and rich dark browns tend to perform best. Laser removal carries higher risk of both hypopigmentation and hyperpigmentation on these skin types, including post-inflammatory pigment changes that can be more visible and longer-lasting than on lighter skin. Saline removal is generally the safer correction method.

Skin condition also affects colour. Oily skin has a higher sebum content which can push pigment outward during healing, causing strokes to blur and colour to appear lighter. Dry skin tends to retain pigment more predictably but can appear to take colour very intensely in session before softening dramatically during the peel phase. Mature skin with thinning epidermis requires conservative depth and pigment saturation.

The Healing Cycle and Colour Shift

Every client goes through the same healing stages, and colour appears different at each stage. Understanding this prevents unnecessary client anxiety and helps you set accurate expectations.

Immediately after the procedure, colour will appear between 20 and 40 percent darker than the healed result. This is caused by the presence of lymph fluid, pigment at the surface of the skin before it settles, and the contrast of fresh pigment against flushed skin.

Days 3 through 7 are the peeling phase. The epidermis sheds and takes surface pigment with it. Clients often panic during this stage because their brows may look patchy, too light, or uneven. This is normal. The pigment that remains is the pigment that has bonded with the dermis. The colour you see at day 10 is the closest preview of the final result.

Days 10 through 28 are the settling phase. The dermis continues to process the pigment, and the skin's surface returns to its natural appearance. The colour will slightly soften and may shift very slightly in tone. By the 4 to 6 week mark, the result is stable enough to assess accurately.

Over months and years, all PMU pigments fade. The rate of fading depends on pigment composition, placement depth, skin type, sun exposure, and skincare products. AHA-based products, retinol, and vitamin C serums all accelerate fading and should be avoided on the brow area. SPF use protects the colour significantly. Sunlight is the primary cause of pigment degradation in healed PMU.

Colour shift during fading is not random. Specific tones fade predictably:

Black pigments frequently shift to blue or grey as the red and yellow components fade faster than the blue. This is the origin of the classic "blue brow" on old tattooed eyebrows done with tattoo ink rather than PMU pigment.

Brown pigments can shift orange or red as the darker neutralising components fade and the iron oxide warm tones become dominant. This is the most common complaint from clients with old microblading.

Cool ash or grey-based pigments can fade to a greenish cast because the warm undertone fades first, leaving a cool-green residual from the remaining pigment components.

Colour Selection: The VELONÉ Framework

Colour selection follows a three-step process: establish the base tone, assess the natural hair colour, and choose your working pigment.

Step 1: Establish the skin undertone. Look at the inside of the client's wrist and inner arm. These areas are less affected by sun exposure and show the natural undertone more clearly. Cool undertones (visible blue or purple veins) mean warm pigments may read more orange or saturated against the skin, so neutral or slightly cool-leaning tones often produce the most balanced healed result. Warm undertones (visible green or olive veins) mean cool pigments may heal flatter or ashier than expected, so neutral to warm tones tend to perform better. Neutral undertones show both vein colours and offer the most flexibility in pigment selection. Identifying the undertone tells you how the skin will interact with your pigment choice so you can anticipate the healed result rather than react to it.

Step 2: Match to natural hair. The pigment should sit within one or two shades of the client's natural brow hair colour. Matching exactly to the darkest strand of hair often produces a result that reads correctly as "natural" to a viewer. Going two or more shades darker than the natural hair creates contrast that reads as drawn-on rather than grown-out, regardless of how precise the technique is.

Step 3: Apply neutralisation where needed. If the client has existing PMU that has shifted orange, apply a corrector with blue or ash base before laying the final colour. If the shift is red, a green corrector is used. This is colour theory applied directly, using the colour wheel to cancel unwanted tones before applying the new pigment on top. The major PMU brands including Perma Blend and Li Pigments produce dedicated neutralising pigments for this purpose, typically labelled as correctors or modifiers.

Mixing Pigments

Pre-mixed pigments are formulated for specific results and are the safest starting point. Custom mixing is a more advanced skill and should be approached conservatively because once you have mixed a colour and applied it to a client, you cannot unmix it.

When mixing, use pigments from the same brand and product line. Different formulations have different carrier solutions and colourant concentrations, which can make their interaction unpredictable. Mix small quantities on a disposable palette. Test the mix on the back of the client's hand and photograph it in good light before applying to the face. Keep a record of the mix ratio so you can recreate it at the touch-up appointment.

A useful principle: add dark to light, not light to dark. A small amount of a dark pigment in a lighter base is easy to build. A large amount of a light pigment added to a dark base is difficult to control without drastically increasing the volume of the mix.

Documentation

Every pigment you use must be documented in the client record. This includes the brand, product name, shade number, lot number, and any mixing ratios used. This is not administrative box-ticking. It is how you recreate a result at the touch-up, identify the product if a reaction occurs, and protect yourself legally if a client later questions what was used on their skin.

Photograph the pigment mix alongside a colour reference card if possible. Record the Fitzpatrick classification in the client file and note any specific skin factors (oily, dry, mature, previous PMU) that influenced your colour decision. This level of documentation is the difference between a practice that can consistently recreate results and one that improvises every time.