Garment Color Consistency: Why the Second Run Never Looks Like the First

The first run sells out, the reorder comes in, and the navy is not the navy. Nobody changed the spec. The Pantone number is identical on both purchase orders. Yet side by side on a shelf, the two shipments read as two different products, and the buyer is now holding stock they cannot mix.

Colour is the fastest way to lose a reorder, and one of the hardest problems to argue about, because both sides are looking at the same reference and seeing different things. Understanding why the shade moves is the only way to write a tolerance that actually holds.

Four Reasons the Shade Moves

The first is the dye lot. Every dye bath is a new chemical event; the same recipe on the same fabric produces a slightly different result each time. Small differences are normal and unavoidable.

The second is the fabric lot. Even with a perfect dye recipe, a different yarn lot or a different knit structure takes the dye differently. Same colour on a 180 GSM cotton and a 220 GSM cotton will not read the same, because the surface reflects light differently.

The third is the gap between lab dip and bulk. A lab dip is a few grams in a small pot; bulk is hundreds of kilos in a production machine with different liquor ratio and temperature curve. Approving a lab dip is not approving a bulk shade.

The fourth is light. Two samples can match under office lighting and split under daylight or shop lighting. This is metamerism, and it is why “it looked fine in the sample room” is not evidence.

What “Same Colour” Should Mean in the Contract

A colour name is not a specification. Write the standard, the instrument and the tolerance, and state which light source governs the judgement.

• Reference a Pantone TCX number plus a physical approved swatch, and say which one wins if they disagree.
• Set a tolerance in Delta E, commonly 1.0 or tighter within a shipment and 1.5 between runs, measured on a spectrophotometer.
• Name the light source for visual judgement, usually D65 daylight, and state the viewing conditions.
• Require a bulk shade band from the actual production dye lot before cutting, not just the lab dip.
• Agree what happens if the reorder falls outside tolerance: re-dye, credit, or hold the shipment.

Keeping a Reorder on the Same Shade

The most reliable lever is continuity. Using the same mill, the same dye house and the same fabric quality for the reorder removes two of the four variables. Changing supplier to save a few cents per metre is how a colour story breaks.

The second lever is the retained sample. Keep a sealed bulk sample from every run, stored away from light, and measure the new lot against it rather than against a screen image. Photographs lie; a physical swatch does not.

The third lever is timing. Ask for the shade band two to three weeks before the cut date, so a rejection still leaves time to re-dye instead of forcing a decision at the port.

What It Costs When It Goes Wrong

A chargeback for shade variation is rarely the real cost. The real cost is that the buyer cannot put two shipments on the same shelf or the same lookbook, so one of them has to be marked down or sold to a different channel. That is a margin problem disguised as a quality complaint.

This is also why experienced buyers split shipments by dye lot and record which lot went to which customer. When the complaint arrives six months later, the answer already exists.

FAQ

Is some colour variation normal in garment production?

Yes. Every dye lot differs slightly, and no factory can produce two runs that are visually identical under every light. What is avoidable is variation outside an agreed tolerance, or variation nobody measured.

What Delta E should I specify?

For most apparel, 1.0 or tighter within one shipment and around 1.5 between runs is a practical starting point. Tighter than that raises cost quickly; looser than that is visible on a shelf.

Why did the lab dip match but the bulk not?

Because a lab dip is a small-pot sample and bulk runs on production equipment with different liquor ratio, temperature and time. Always approve a bulk shade band from the actual dye lot.

Can a factory guarantee the same shade a year later?

Only with conditions: same mill, same dye house, retained sample and a measured tolerance. Even then, expect a small shift. A supplier who promises exact match without those conditions is promising something they cannot control.