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Seasonal colour planning: the dye-lot risk nobody budgets for
Seasonal colour planning is the practice of deciding, before a selling window opens, which shades a crochet range will use, on which fibre, approved against a physical standard, and with a written tolerance for the next dye lot. It exists because the thing that most often breaks a reorder is not design and not price: it is that the second production run arrived in a slightly different shade than the first, and nobody had agreed in advance what "slightly" meant.
Why colour, not design, is what breaks a reorder
A buyer who reorders a crochet line is not really reordering an object. They are reordering a shelf: the same object, next to the leftovers of the first order, in front of a customer who has already seen it. That is a much stricter test than the first order, which was judged on its own. On the shelf, a shade difference of a few percent becomes visible, and a visible difference turns a repeat product into a mismatched pair.
Design changes are visible and therefore get discussed. Colour drift is quiet: it survives photography, it survives a sample approval done from a photo, and it only shows up when the two lots are physically adjacent. By then the goods are knitted. This is the structural reason colour deserves a planning step of its own rather than being a line on the spec sheet.
What a dye lot actually is
A dye lot is a single dyeing run. Yarn inside one lot shares the same fibre batch, the same dye bath and the same process window, so it matches itself to a degree that no two lots can match each other. The colour number on the cone is a name for a target; the lot is the physical reality you receive.
Three practical consequences follow, and they are worth stating plainly because they are the source of most disputes:
- Two lots of the same colour number are not the same colour. They are two attempts at the same target, and the gap between them is a manufacturing variable, not a defect.
- A reorder is a new lot. Unless yarn was held over from the first run, the second order is dyed later, which means it is a different lot by definition.
- Holding yarn is the only true fix. If a line will be reordered, the reliable answer is to dye enough for both orders at once and hold the balance, which is a working-capital decision the buyer has to make consciously rather than a favour a mill can promise indefinitely.
This is also why colour and quantity planning belong in the same conversation. Our low-MOQ programme exists precisely so a buyer can test a shade at small volume before committing to a dyed quantity that has to carry a whole season.
Lab dips: the cheapest moment to say no
A lab dip is a small sample dyed to the target shade before bulk. It is the only stage where a rejection costs almost nothing: the mill re-dips, and the cost is a few days and a hank of yarn. The same error found on finished pieces costs re-knitting, and re-knitting is a capacity problem that lands in the middle of a season.
What a useful dip approval contains:
- The dip itself, physically. Not a scan, not a photograph. Two copies if two people will sign.
- The reference it was matched against, named by code and date, so a later argument is about a document rather than a memory.
- The fibre and count the dip was made on. A dip on a different yarn is not a dip for your product.
- A written verdict — approved, approved with comment, or rejected with the direction of the error ("too warm", "too dark"), because "not right" cannot be corrected.
Approving a dip from a photograph is the single most common shortcut, and it fails for a structural reason: a phone camera applies auto white balance, then a contrast curve, then a saturation boost, and the reviewer's screen applies a profile on top of that. Two competent people can look at the same file and be honestly looking at two different colours.
Shade cards, and the three conditions to check them under
A shade card is only useful if it is checked the way the customer will see the product. Three conditions cover almost every real situation, and a shade that survives all three is safe:
| Condition | What it catches |
|---|---|
| Daylight, near a window, no direct sun | The true hue relationship between two shades; neutral and honest |
| Warm retail lighting (around 3000K) | Metamerism — two shades that match in daylight and separate under shop light |
| Cool office or phone screen light | Shades that go grey or blue, which is what most buyers see when they open a listing |
Metamerism deserves its own sentence because it is invisible in a single-light review: two samples can be a perfect match under one light source and clearly different under another, because their underlying dye chemistries differ. If a range will be sold in shops, check the card under warm light, not only under the window you happen to have.
Writing colour into the purchase order
Most colour disputes are not disagreements about what happened; they are disagreements about what was agreed. Four clauses remove nearly all of it, and none of them requires technical vocabulary:
| Clause | What it should say |
|---|---|
| Standard | "Colour to match approved dip reference [code], dated [date], held by both parties." |
| Judging condition | "Match to be assessed in daylight and in 3000K retail light, samples adjacent, at arm's length." |
| Out-of-tolerance remedy | Re-dye, re-knit, accept at a stated adjustment, or reject — chosen in advance, not negotiated after delivery. |
| Continuity | Whether the next order is expected to match the same standard, and who holds the retained sample. |
Two habits make these clauses work. Keep a retained sample of every approved lot, sealed and labelled, held by both sides; and record the lot number on the packing list, so a future complaint can be traced to a specific run instead of to the whole relationship. Both are cheap now and decisive later.
Fibre decides how a shade drifts
The same target shade behaves differently depending on what it is dyed onto, and this matters when a range mixes fibres for texture or price reasons:
- Cotton takes dye flatly and reads matte. A lot difference usually shows as a slight shift in value — lighter or darker — rather than a change in hue, which makes it easier to live with in a solid-colour range and harder to hide in a gradient.
- Acrylic is dyed in the mass or on tow, gives a more saturated and more uniform surface, and reflects light more sharply. It matches well across lots, but that sharpness exaggerates any difference the moment a camera is involved.
- Blends are the hardest case, because two things can drift at once: the dye and the ratio of the two fibres. A blend that matched perfectly in a dip can separate slightly in bulk without anything going wrong in the dyeworks.
If a range mixes fibres, plan the shade per fibre rather than per colour name. Our notes on yarn types for crochet toys cover how cotton, acrylic and blends behave in the finished piece; colour continuity is the part of that decision buyers notice last and complain about first.
Planning the calendar around shade approval
Seasonal colour planning is a sequence, not a date. The order that works:
- Lock the palette — how many shades, on which fibres, and which one is the hero colour that carries the range.
- Dip and approve — physical dips, signed, with the retained sample kept by both sides.
- Knit the pre-production piece in the approved yarn, because a dip on a hank and a knitted surface do not read identically.
- Photograph the approved piece, and use those images as the reference for the rest of the season rather than re-shooting per lot.
- Dye, knit and check the production lot against the retained sample before it ships.
Two rules of thumb keep this honest. Lock colour before the listing goes live, because a published shade becomes the standard whether or not it was approved. And treat the first production lot as a sample, not as stock: if it is going to become the de facto standard for the season, it is worth checking twice.
For ranges where the customer picks the shade rather than the designer, the same discipline applies through a different route — see custom colourways for how a chosen palette is turned into a repeatable specification rather than a one-off.
Frequently asked questions
What is a dye lot, in plain terms?
A dye lot is one batch of yarn that was dyed together in a single run. Everything inside that batch shares a recipe, a water bath and a moment in time, so it matches itself almost perfectly. The next run is a different lot even when the recipe is identical, because the fibre, the water and the operator's judgement all shift slightly. This is why two sweaters knitted from the same colour number can sit next to each other and look different: the colour number is a name, the dye lot is the physical fact.
How much colour variation is normal between lots?
Small variation is normal and unavoidable in any dyed yarn; the question is whether it is visible side by side at retail. Most buyers handle this by agreeing a tolerance in writing before the order rather than arguing about it after delivery, and by judging against a physical approved standard instead of a screen. A variation you cannot see at arm's length in ordinary shop lighting is usually acceptable; one you can see across a table is not, whatever the instrument says.
Why do lab dips matter more than the final inspection?
Because a lab dip is the only point in the process where rejecting costs almost nothing. A dip is a small hank or swatch dyed to your target shade; if it is wrong, the mill re-dips. If the same error is discovered on finished pieces, the fix is re-knitting, and re-knitting is a production problem, not a colour problem. Buyers who approve dips carefully and in writing spend far less time on colour disputes later than buyers who approve a shade from a photo.
Can a phone photo be used to approve a colour?
Only for gross errors. A phone applies its own white balance, contrast curve and saturation boost, and every screen renders those differently, so two people looking at the same file can legitimately disagree about the shade. A photo is useful to confirm that the right dip was sent and that nothing is obviously off; it is not a valid approval record. Physical swatches, sent by courier and signed off, are the only version of approval that survives a dispute.
How should colour be written into a purchase order?
Name the approved standard by its reference and its date, not by a colour name; state the lighting condition under which the match will be judged; state what happens to a lot that falls outside tolerance, in terms of re-dye, re-knit, or a price adjustment; and state whether the next order is expected to match the same standard. Four sentences, written before the deposit, remove most of the argument that otherwise happens three months later.
Does the fibre change how much a shade drifts?
Yes, and the direction of drift differs by fibre. Cotton takes dye in a flatter, more matte way, so a small lot difference reads as a slight value shift rather than a hue shift; acrylic is dyed in the mass or on tow and can look more saturated and more even, but it also reflects light more sharply, which exaggerates any difference in a photograph. Blends sit between the two and are the hardest to match across lots, because the ratio of the two fibres can vary slightly from batch to batch as well as the dye.
When in the season should a colour range be locked?
Early enough that the dye lot can be dyed, knitted and checked before the selling window opens, and that is a sequence rather than a fixed number of days. The practical rule is to lock the shade before the range is photographed and before any listing goes live, because once a buyer has seen a specific shade, every later lot is measured against it. Ranges that lock colour late end up with the first production lot becoming the de facto standard, which is the worst possible outcome for the second lot.