Print and colour tolerances — why the colour sometimes differs

You receive the print run, hold the printout up to the design on your screen — and the colour seems slightly off. Before you call it a mistake, it’s worth knowing that in printing and packaging production there are print tolerances — small, permissible deviations from the design, built into the nature of the process. It’s not a defect or carelessness but physics: ink, paper and the machine behave differently from a backlit monitor. Below we explain where these differences come from, which types of tolerance are an industry standard and how to set expectations in advance, so that receiving the print run is a satisfaction rather than a disappointment.

A tolerance isn’t a defect — it’s a feature of the process

In everyday thinking, “a different colour” means “a mistake”. In print that isn’t true. Every physical process — applying ink, the paper’s absorbency, the work of the knife and the creasing rule — has its natural margin. A tolerance is a pre-agreed, permissible range of deviation from the reference, not the result of anyone’s carelessness. It’s the same for a tailor, a carpenter or a screw manufacturer — nothing made in the real world matches the drawing down to the last hundredth.

Knowing these limits is in your interest. If you know in advance that the colour may shift minimally and the cutting line may deviate by a fraction of a millimetre, you receive the print run calmly and matter-of-factly. If you don’t know it, the same small difference can cause needless disappointment. That’s why, instead of promising an impossible “1:1”, we prefer to set expectations honestly before printing.

Screen isn’t print — why colour never comes out 1:1

The biggest surprise concerns colour and has a simple physical cause. A monitor emits light — it shows colour in the RGB model, mixing red, green and blue light that goes straight into your eye. A printout doesn’t emit light — colour in the CMYK model is created from inks, and you see the light reflected off them. These are two different mechanisms, so a colour from a backlit screen simply cannot come out identical on paper. The colour from a monitor will always be only a point of reference, not a guarantee.

On top of that comes repeatability. A colour built in CMYK from four inks may shift minimally between runs, because each time it’s created from a mix. If your brand rests on a single recognisable colour, it’s worth securing it as a ready ink — we write separately about choosing CMYK or Pantone in packaging, but in short Pantone is the surest route to a repeatable colour from order to order. You can read about how colour works for your brand in our piece on the psychology of packaging colours.

Types of tolerance worth knowing

In packaging print you’ll meet several tolerances independent of one another. Treat all the values below as an approximate industry standard, not a rigid, guaranteed specification:

• Colour deviation (ΔE) — ΔE is the measure adopted in print for the difference between two colours; the lower the value, the harder the difference is to catch with the eye. A small ΔE between the printout and the reference is the norm, not a fault.
• Registration — the individual colours are laid down separately, so they can shift minimally relative to one another. With a correctly prepared file this is invisible, but a small margin of the order of tenths of a millimetre always exists.
• Cutting, creasing and folding — the knife and the creasing rule work with a tolerance of the order of a few millimetres, which is why important elements shouldn’t reach the very edge, and the background is best extended into the bleed.
• Differences between material batches — paper and board from different batches may differ minimally in shade of white or texture, which affects the final look of the print.

Print tolerances — an approximate table

The table below gathers the most important tolerances in one place. The ranges given are approximate and show the industry standard — they are not a guaranteed specification for a specific job:

Material changes the colour — kraft dims it, white renders it more faithfully

There’s one more factor that’s easy to forget at the design stage: the same file gives a different result on a different substrate. The colour of the material’s background “comes through” under the print and co-creates the final colour, which is why the choice of paper is part of colour management, not just a matter of aesthetics or price.

• Kraft — has its own warm, brown tone that dims colours. An intense red will come out rather brick-like, and light colours will lose their punch. This isn’t a fault but an aesthetic that suits a natural, craft message.
• White board — a clean background that renders colours more faithfully and allows full, vivid coverage. If your palette rests on a strong, specific colour or on a product photo, white will be the safer choice.

How to minimise disappointment

Tolerances can’t be removed, but they can be tamed and narrowed. A few simple habits set expectations on the right side:

• Work in CMYK from the start — a design prepared in the print space, rather than in screen RGB, limits surprises at the print-acceptance stage.
• Secure the key colour as Pantone — if the brand rests on a single colour, a ready ink gives the surest repeatability between orders.
• Approve the visualisation before printing — check the layout, content and colours on the visualisation; just remember that a digital preview on screen is not the final print from the machine.
• For a critical colour, ask for a sample — a physical packaging sample shows the colour on the target material better than any preview on a monitor.

On our side we watch over colour repeatability as far as the process allows, we provide a visualisation for approval before printing with every project, and we advise on choosing the brand colour and material. Design and visualisation are included in the price, and we produce from 500 units — so that you make the colour decision consciously, before the run starts.

Frequently asked questions

Why does the colour in print differ from the one on screen?
Because a screen emits light (the RGB model, backlit light), while a printout reflects light off the ink (the CMYK model). These are two different mechanisms of colour creation, so a colour from a monitor will never come out identical on paper. Treat the monitor as a point of reference, not a guarantee of the final colour.

What is ΔE and what difference is acceptable?
ΔE is the measure adopted in print for the difference between two colours — the lower it is, the harder the difference is to notice with the eye. A small deviation between the printout and the reference is an industry norm, not a fault. Treat specific values as approximate; they depend on the material, the colour and the technology.

Will the colour be identical in every subsequent run?
In CMYK the colour is created from mixing four inks, so it can shift minimally between runs. If you care about the highest possible repeatability of a single brand colour, it’s worth securing it as Pantone. We look after colour consistency as far as the process allows, from order to order.

Why does the same design look different on kraft and on white board?
Because the colour of the material’s background co-creates the final colour. Kraft has a warm brown tone that dims colours and warms them, while white board renders colours more faithfully and allows vivid coverage. If you care about a strong, intense colour, choose white.

Can I see the colour before printing?
Yes. With every project we prepare a visualisation for approval, so you can see the layout and colours before production. For a critical colour we additionally recommend a physical sample, because a digital preview on screen is not yet the final print. Design and visualisation are included in the price.

Check the colour before printing

The simplest way to start is with specifics: give us the packaging type, the material and the brand colour, and we’ll prepare a visualisation for approval, advise on the colour and calculate a preliminary quote — before anything goes to print:

→ Order a design with a colour visualisation

See also

Designing packaging from scratch? Start with the guide on how to design packaging with a logo, and if you’re wondering how the technology affects colour and repeatability, check the comparison of digital printing vs offset. We are a packaging manufacturer from Warsaw — design and visualisation are included in the price, we produce from 500 units and ship across all of Poland.