Buyer guide · 3 min read

Men’s Underwear Colorway and Lab-Dip Basics

A colorway is one colour version of a style. A solid, a yarn-dyed stripe, a print and a contrast panel are not the same approval. This note repeats the steps already used on the style and range pages: you supply the colour reference, you approve a lab dip for each core colour, and you approve a strike-off for any stripe or print before bulk. It does not publish a colour-match tolerance, a laboratory result or a list of colours.

By the YXLP product development team · Published November 1, 2026

What a colorway is

A colorway is the colour version you want made. A black body and a white body can share one measurement chart. A light inner-leg panel is a different colorway, not an automatic part of every colour. Keep colorways on one measurement chart so the fit does not change when the colour does.

Start with solid core colours. Every colour is a separate fabric lot. A stripe, a check or a print is a separate fabric approval, not a note added after the solid is agreed.

The colour reference is something you supply

Supply colour references (Pantone numbers or fabric swatches). A Pantone number is a reference you send, in the same way a swatch is. It is not a result from this site, and it is not proof that a dyed fabric already matches it. Judge the dyed cloth or the printed sample, not the file and not the screen.

Which approval to ask for

Colour work already named on the style and range pages, and the approval that goes with it
Colour workApproveWhat that approval is not
Solid core colourA lab dip against the colour reference you suppliedA catalog photo or a colour on a screen
Stripe, check or printA strike-off on the fabric you selectedApproval of the fit sample
Contrast panel or trimIts own colour reference and its own approvalProof that every other colour includes that panel
A later dye lotA shade band or a lot-to-lot comparison with the approved sampleProof that the first order’s terms still apply

Approve a lab dip for each core colour and a strike-off for any stripe or print. Fabric, colour and print are later checked against the approved sample and the lab dip or strike-off.

Lab dip for solid colours

A lab dip is the dyed fabric you compare with your colour reference before bulk. Deep colours need a colourfastness check. The ISO 105 colourfastness series is the usual reference, for example ISO 105-C06 for washing and ISO 105-X12 for rubbing. Ask your lab which method suits your market and write it into the purchase order. This page does not state a pass or fail figure.

Strike-off for prints, stripes and checks

A strike-off approves colour and artwork. A fit sample approves measurements. Say which one you are looking at. Yarn-dyed checks and stripes need pattern matching at the side seams and fly. Printed fabrics need print-repeat and shade approval. Sublimation, screen print and other methods behave differently on different cloths. Approve a strike-off on the fabric you selected.

Send the artwork or colour references, the fabric you want sampled, and the measurements. The catalog photograph is one reference, not your color standard.

A catalog photo is not the colour standard

The shades in a photograph are not the shades you have approved. Write the colours you sell, not only the shades in a photo. A row of colours is not a pack. Lettering in a photo is not your logo. If a light inner-leg panel appears in one frame, say whether that panel is required, and on which colorway.

Shade between dye lots

Ask how shade differences between dye lots are controlled, and approve a shade band or a lot-to-lot standard. A basic colorway has to be reorderable. Identify the fabric and the band artwork version, and keep the approved sample as the reference for every reorder.

What to send before a colour is approved

  1. Name each colorway: a solid, a stripe or check, a print, or a contrast panel.
  2. Send colour references (Pantone numbers or fabric swatches) and the fabric you want sampled.
  3. Approve a lab dip for each core colour and a strike-off for any stripe or print.
  4. Record which physical sample is the shade reference for later lots.
  5. Keep those colorways on one measurement chart.

Price, the way a minimum is counted, and timing are quoted against that brief. This page does not publish them.

Common questions

Does a Pantone number prove the fabric matches?

No. A Pantone number or a fabric swatch is a colour reference you supply. Approve a lab dip for a solid, or a strike-off for a print, on the cloth you selected. This page does not publish a match tolerance or a laboratory result.

Is the catalog photograph the colour standard?

No. The catalog photograph is one reference, not your color standard. Write the colours you want sampled, and approve them on a lab dip or a strike-off.

Do solids and prints use the same approval?

No. Approve a lab dip for each core colour and a strike-off for any stripe or print. A strike-off approves colour and artwork. A fit sample approves measurements.

Ready to brief a style?

Send a reference garment or sketch, the quantities you are considering and your destination. The quotation will state what is included and how minimums are counted.