How to Match Activewear Colors on Repeat Orders
Your first order sold well, and now the reorder looks slightly different on the shelf. Small shade changes between dye lots are normal, but they can be controlled. This guide shows how to set a color standard, approve each new lot and decide what to do when a color misses.
- Keep a master swatch from every approved color.
- Compare new lots with the master, not with a Pantone chip or a screen.
- Agree your tolerance in writing before bulk dyeing.
- Check colors under more than one light, because a match can change with the lighting.
- Approve fabric before cutting, and check elastic, thread and binding as well.
Why colors change between orders
Every dye lot is a new batch, so an exact repeat is rarely possible. These are the usual causes:
| Cause | What happens | How to reduce it |
|---|---|---|
| New dye lot | A new batch can come out slightly lighter, darker or warmer | Approve each lot against the master swatch |
| Different fiber | Nylon, polyester and spandex take dye differently | Check each material, not only the main fabric |
| Fabric change | A new weight, knit or finish changes how a color looks | Keep the fabric spec the same, and confirm any change first |
| Lighting | Two colors match in one light but not in another | Agree the light sources for approval |
| Finishing | Heat and finishing can shift a shade | Judge the finished fabric, not an earlier stage |
Set your color standard on the first order
Repeat orders are easier if the first order leaves a clear record. Once you approve a color, keep a master swatch: a piece of the approved fabric, sealed and stored away from light. Keep one for yourself and ask your manufacturer to keep a matching one.
Label it with:
- Style number, color name and order number
- Pantone reference
- Fabric name, composition and weight
- Dye lot number, if available
- Approval date and who approved it
Avoid approving colors from photos or screens. For a custom color, the color is confirmed separately with a color card or fabric swatch before bulk production. Our sampling guide explains how this fits with fit approval.
What is a lab dip?
A lab dip is a small dyed sample made to check a color before bulk dyeing. It is most useful for a custom color, a new fabric or a color that was hard to match last time. Check it on the fabric you will produce, because the same color can look different on another fabric. If it is close but not right, say how it should change, such as "slightly less red" or "a little lighter", rather than only "not right".
Agree a color tolerance
Tolerance is how far a new lot can differ from the standard and still pass. There are two common ways to judge it:
| Method | How it works | Good for |
|---|---|---|
| Visual check | Compare the lot with the master, side by side and in agreed lighting | Most small and growing brands |
| Measured check | Measure the difference, shown as Delta E (ΔE), with a spectrophotometer | Large programs and retailer requirements |
There is no universal number. Supplier guides often suggest a ΔE of about 1 to 2 for solid colors, with tighter limits for sensitive shades such as nude, gray and cream. If you use a number, write down the formula and the light sources as well. If you use a visual check, agree who decides and what will be compared. Either way, put it in your tech pack or order notes before bulk dyeing.
Check colors under more than one light
Two colors can match in one light and look different in another. This is called metamerism. It is a common reason why a color passes at the factory and looks wrong in a store. Agree which lights matter for your brand, for example:
- Daylight: often D65 in a color viewing booth
- Store lighting: often TL84, a fluorescent light source
- Warm indoor light: useful if your customers mainly see products at home
If you do not have a viewing booth, check samples beside a window in daylight and again under your usual indoor light. Compare fabrics flat, in the same direction and with the same number of layers.
How to approve a repeat order color
- Send the reference. Quote the previous order, style and color, and send a master swatch if needed.
- Confirm the fabric. Check that the composition, weight and finish have not changed.
- Review the new lot. Ask for a swatch or lab dip from the new dye lot.
- Compare it. Check it against the master in your agreed lighting.
- Check the trims. Look at elastic, thread, binding and logo colors next to the fabric.
- Approve before cutting. Once fabric is cut, your options become much more limited.
- Record the result. Keep the lot number, date and decision with the order.
Match the trims, not only the fabric
Elastic, thread, binding, lining and zippers are often made from different materials and sourced separately, so they do not always follow the main fabric. The problem shows most clearly on sports bras, where elastic and binding sit right next to the shell fabric.
List the color of each part in your order, as you would for matching sets. Check parts together on a finished sample rather than one by one. For dark colors, also check that thread and elastic do not show lighter when the fabric stretches.
Match a new run to stock you already have
You may need new sports bras to match leggings that are already in your warehouse. Send a garment from the current stock as well as the master swatch, because stored or displayed products can change a little over time. Then decide which matters more: matching the master or matching the stock.
If pieces will be sold as a set, try to produce them together from the same fabric lot. Seamless and Cut & Sew pieces are harder, because seamless yarn and Cut & Sew fabric are dyed differently, so check those colors side by side on the samples. See seamless vs cut and sew for how the two routes differ.
Keep dye lot records
Good records make the next order faster and help you trace a problem later. Keep a simple sheet for each color with the order number, style, fabric, dye lot, approval date, approver, tolerance and any comments.
Keep each garment within a single lot, so panels do not show different shades side by side. If an order uses more than one lot, ask for cartons to be marked by lot, so you can keep the lots apart in your warehouse.
What to do when a reorder fails shade approval
| Situation | Option |
|---|---|
| Fabric is not cut yet, and the shade is clearly off | Ask for an adjustment or a new dye lot, and review the effect on timing |
| The shade is close, but outside the tolerance | Review it in your agreed lights, and decide whether to accept it as a recorded exception |
| The color will be sold alone, not with older stock | A small difference may be acceptable, so judge it by how customers will see it |
| The pieces must match an existing set | Avoid mixing lots; keep the new lot in separate sets or re-dye it |
Put your decision in writing and update the record, so the next order does not start from the wrong reference.
Plan reorders to reduce color risk
- Order related pieces together where you can, especially sets.
- Use stock colors for a first order. Custom-dyed colors cost more and can need a higher MOQ.
- Leave time for approval, especially for sensitive colors.
- Keep the fabric spec the same unless you are ready to approve the color again.
- Plan reorders from sell-through. Our guide to size splits covers quantities, and the MOQ guide explains reorder minimums.
Common color mistakes
- Approving colors from a photo or screen.
- Not keeping a master swatch from the first order.
- Comparing a new lot with a Pantone chip instead of the approved fabric.
- Checking colors under only one light.
- Forgetting elastic, thread and binding.
- Mixing dye lots in the same garment or set.
- Approving the color after the fabric has been cut.
Color is one part of your final check. Our quality control page and AQL inspection guide explain how orders are inspected against the approved sample.
Frequently asked questions
Why does the color change between activewear orders?
Each dye lot is a new batch, so small differences are normal. Changes in fabric, fiber, finishing and the light you check it under can also make a color look different.
What is a dye lot?
A dye lot is a batch of fabric or yarn dyed together. Pieces from the same lot usually match closely, while pieces from different lots can show small differences.
What is a lab dip?
A lab dip is a small dyed sample made to check a color on the chosen fabric before bulk dyeing. You compare it with your color reference and approve it or ask for an adjustment.
Should I compare a new lot with the Pantone reference or the master swatch?
Use your approved master swatch for repeat orders, because it shows the color you actually accepted on that fabric. Keep the Pantone reference on file as the starting point.
What color tolerance should I set?
There is no universal number. Supplier guides often suggest a Delta E of about 1 to 2 for solid colors, with tighter limits for sensitive shades such as nude, gray and cream. Agree the number, the formula and the light sources in writing.
Can seamless and Cut & Sew colors match exactly?
Not always. Seamless yarn and Cut & Sew fabric are dyed differently, so the colors are checked side by side on the samples. Approve them together if the pieces will be sold as a set.
Planning a reorder or a custom color?
Tell us the style, the color reference and your previous order details. We review the fabric and color route, and reply with a quote within 24 hours. Only your work email is required.
- A tech packShare technical drawings, measurements and material requirements.
- A reference productShare a photo, product link or sample, with the details you want to develop.
- An early ideaDescribe the category, intended activity and wearing experience.