Xiamen Unitex Trade Co., Ltd. is a professional underwear sourcing & supply-chain management company based in Xiamen, Fujian Province, in the Xiamen–Quanzhou–Jinjiang knitwear cluster of south-east China. Founded by Will Lin, who has worked in the apparel trade since 2004, the company has been exporting since 2009 and was incorporated in Xiamen in 2013. It runs its own liaison office in Jinjiang and works with a network of BSCI & OEKO-TEX Standard 100 certified partner factories to serve retailers and brands across Europe, the US and Australia.
Colour is the cheapest variable to change on an underwear range and the most expensive one to get wrong. It costs nothing to add a shade to a line sheet and a great deal to carry it through dyeing, packing and markdown. The useful question for a buyer is therefore not which colours a group of shoppers says they prefer, but how many shades a given range can carry before depth collapses — and that is a planning question, not a personality one.
This page covers what colour-preference reporting can and cannot support, how the basic-to-fashion split is set, why nude is a range rather than a colour, and where colour decisions turn into cost and lead time.
What colour-preference data can and cannot tell you
Reported preference is a statement of intent, collected away from a price tag and away from a fitting decision. It is a reasonable starting hypothesis and a weak predictor of sell-through, because the same shopper who names a seasonal shade at a survey will still buy the black three-pack when the price is on the shelf.
What the data is genuinely useful for is direction: whether a market skews toward neutrals or toward seasonal colour, and whether that skew shifts by age band. Younger buyers tend to cycle through more shades within a season; older buyers tend to stay with neutrals and reorder them. That pattern is consistent enough across markets to plan against, but it describes a tendency, not a quantity.
The evidence that actually settles a colour decision is sell-through by shade, tracked against the depth it was bought at. A shade that sold out at limited depth is a different signal from one that sold the same units at four times the depth, and only the second is a candidate for expansion.
Basic and fashion: how the split is decided
A commercial range carries a neutral base that repeats season after season, and a fashion block that is replaced rather than repeated. Black, white, grey and the market’s nude tones sit in the base; prints, saturated brights and trend shades sit in the block. The base is what makes the range reorderable; the block is what makes it look current.
The split is set by the retail format rather than by taste. A supermarket multipack programme will run a base far heavier than a boutique capsule, because the pack has to be assorted from stock that is always available. A brand selling single pieces online can carry a wider fashion block, because it does not have to fill a shelf and can let a shade sell out.
Where the split is decided badly, the symptom is familiar: fashion shades left at end of season in broken size runs, marked down while the base is out of stock in the fastest-selling size. That is a depth problem presenting itself as a colour problem.
Depth-to-breadth by age band
Depth is how many units of one shade you buy; breadth is how many shades you carry. The two trade against each other inside a fixed open-to-buy, and the ratio that works is not the same across age bands.
For a younger customer, breadth earns its place: the purchase is more likely to be driven by wanting a new shade, and a range that only offers neutrals reads as dated. For an older customer, depth earns its place: the purchase is more likely to be a replacement, the neutral is the reason for the visit, and a missing size is a lost sale rather than a prompt to try another colour.
The practical rule is to set the ratio per age band rather than across the range, and to hold the fashion block at limited depth on purpose. A fashion shade bought to the same depth as the base converts a colour decision into a markdown decision.
Nude is a range, not a colour
A single nude tone covers only part of any market. Skin tone varies within a country as much as between countries, and a shade that reads as invisible on one wearer reads as beige on another — which is the whole point of the category, and the reason a nude programme is specified as several tones rather than one.
How many tones is a market question, not a colour-card question. Ranges selling into multi-ethnic markets carry a wider set than ranges selling into a single-region market, and the count is usually set by the size of the addressable segment rather than by the mill’s ability to dye it.
Nude also exposes the substrate problem more than any other shade. The same tone reads differently on a 140 g/m² cotton jersey and a 180 g/m² interlock, and differently again on a modal blend, because opacity and surface texture change how the colour appears. A nude approved on one substrate is not approved on the range.
Where colour hits cost and lead time
Every colour is a separate dyeing lot, with its own minimum at the fabric mill and its own shade-matching cost. The consequence for a buyer is direct: colour count multiplies the minimum order quantity. For briefs the minimum is 2,000 pieces per style per colour, so a six-shade range is six minimums, not one.
Lead time moves the same way. A shade already in the mill’s lab-dip library adds days; a shade that has to be matched from a Pantone reference adds a lab-dip round before dyeing can start, and each round is a separate approval. A range that introduces four new shades late in the calendar is a range that ships late.
Lot-to-lot variation is the third cost. Two dye lots of the same reference will differ slightly, and the difference shows up as a seam where two panels from different lots meet. The fix is procedural rather than technical: ask for the dye lot tolerance in writing for pale shades, and where possible cut a style from a single lot.
Colour fastness: what to specify
Colour that does not survive washing is a return, not a shade. Fastness is tested under the ISO 105 series, and three of its parts matter for underwear: resistance to washing, to rubbing and to perspiration. Results are graded on the grey scale, and the grade — not the word “fast” on a mill’s datasheet — is what belongs in the specification.
Pale and saturated shades are not equal here. A white or a pale nude shows any change of shade immediately, and a deep red or navy shows any bleeding onto a lighter trim. Both need their own limits rather than the range’s default.
Approval procedure matters as much as the number. Match the lab dip under D65 daylight rather than under office lighting, approve against a retained standard rather than against memory, and record the approved standard with the order so that a reorder is judged against the same reference.
Building the first colour card
A workable first card for a women’s underwear range is built in three layers: a neutral base of three to four shades carried deep, a nude set sized to the market, and a fashion block of three to five shades carried shallow. Set the depth for each layer before the shades are chosen, then choose the shades against the depth you have.
Two items belong in the specification alongside the shades. The first is the care label content under ISO 3758, because a shade that requires a different wash instruction cannot share a label with the rest of the range. The second is the custom logo position on the care label and the pack, since a deep shade and a pale shade often need different print colours for the same artwork.
Partner factories in our network hold amfori BSCI and OEKO-TEX Standard 100 certification. Send a colour card with target depth per shade and the market the range is going into, and the shades can be matched and costed against the minimums that apply.
· Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner