A client came to us last year — a bakery owner who had just received 500 business cards and a stack of packaging labels. She'd spent weeks choosing her brand colours. A warm coral-orange that felt like her brand exactly. Energetic, warm, approachable.
The cards arrived. The coral was gone. In its place was a flat, slightly brownish orange that looked nothing like what she'd approved. The labels looked even worse — the colour looked almost muddy on the glossy substrate.
She thought the printer had made a mistake. She was ready to demand a reprint.
The printer hadn't made a mistake.
She had sent a logo in RGB. The printer converted it to CMYK. Nobody told either of them that coral-orange is one of the colours that shifts most dramatically in that conversion, and that the fix requires doing the conversion deliberately, not automatically.
This situation — some version of it — happens constantly. Understanding why prevents it from happening to you.
The Root Cause: Two Completely Different Colour Systems
Screens produce colour by emitting light. Red, green, and blue light mixed at different intensities creates every colour you see on a monitor. This is RGB. It can produce vivid, highly saturated colours that are physically impossible to print, because they rely on light emission rather than ink absorption.
Printers create colour by layering transparent inks onto paper. Cyan, magenta, yellow, and black — CMYK. The inks absorb certain wavelengths of light and reflect others. This is a fundamentally different process with a fundamentally smaller range of reproducible colours.
When a printer converts an RGB file to CMYK automatically (which is what happens when you send an RGB file to a print shop), the conversion algorithm makes decisions about how to approximate the RGB colours within the constraints of CMYK. It does this numerically, not visually. The results are often fine for photographs and complex imagery. For brand colours — particularly vivid blues, electric greens, and warm corals — the automatic conversion frequently produces colours that look noticeably different.
The bakery client's coral was specified as a bright orange-red in RGB (something like R:255 G:100 B:60). When automatically converted to CMYK, the algorithm produced something in the region of C:0 M:70 Y:65 K:5 — which, when printed, appeared as a noticeably different shade.
The correct approach would have been to find the CMYK values that produce the closest match to the intended colour in ink, test it on the target substrate and printer, and specify those values explicitly rather than relying on automatic conversion.
How to Know If This Will Be a Problem for Your Logo
Not all colours shift dramatically between RGB and CMYK. Some colours are naturally printable and convert cleanly. Others shift significantly.
Colours that typically convert well:
- Neutral tones (greys, browns, blacks)
- Darker, more saturated colours
- Standard blues and navies (though bright blues shift more than dark blues)
Colours that frequently shift significantly:
- Vivid oranges and corals
- Electric blues and cyans
- Bright greens (especially lime and neon greens)
- Hot pinks and magentas
- Any highly saturated, vivid colour that relies on RGB's extended gamut
The test is simple: open your logo in Adobe Illustrator, set the document colour mode to CMYK (Edit → Document Colour Mode → CMYK if you're on Mac, or Document → Colour Mode → CMYK), and see how the colours change. If a colour you've defined as, say, R:0 G:180 B:255 shifts visibly when you convert the document, you have a colour management issue to address before printing.
You can also use Illustrator's gamut warning (View → Gamut Warning) to highlight any colours in your logo that fall outside the CMYK printable range. These are the colours most at risk of shifting.
The Three Ways to Fix It
Option 1: Adjust the CMYK Values Manually
Rather than letting the printer's RIP (raster image processor) convert your RGB values automatically, you specify the CMYK values yourself. This means:
- Converting the document to CMYK colour mode in Illustrator
- Selecting each brand colour and adjusting the CMYK sliders until the on-screen CMYK representation looks as close as possible to the original RGB colour
- Documenting those specific CMYK values for every brand colour
This isn't perfect — you're still working with the limitations of CMYK — but it puts you in control of the conversion rather than leaving it to an algorithm. The result is usually significantly better than automatic conversion.
Document the final CMYK values alongside the hex and RGB values in your brand guidelines. Your printer needs CMYK values, not hex codes. See complete logo file handoff for how colour documentation should be structured.
Option 2: Use Pantone Colours
Pantone (PMS) colours are pre-mixed inks — the printer doesn't mix them from CMYK dots, they're produced from a single standardised ink. The colour you specify is the colour you get, regardless of substrate or printer. Within the constraints of what Pantone produces, the colour is consistent across every print run and every vendor.
This is the gold standard for brand colour accuracy in print. The limitation: Pantone printing costs more (each Pantone colour is an additional ink run) and isn't available from all printers (digital printers can't use Pantone).
For a brand where colour accuracy is commercially important — a brand colour that appears on packaging, signage, and uniforms across multiple vendors — Pantone specification is worth the cost. See Pantone matching guide for how the specification process works.
Option 3: Request a Printed Proof Before Full Run
Before approving a full print run, request a hard proof — a physical printed sample using the actual substrate and print process. Review the proof against a printed Pantone swatch book, not your monitor.
A monitor is not a valid reference for approving print colour. Even a calibrated monitor shows colours using light emission. A printed proof on the target paper shows colours in reflected light — the only relevant comparison.
Most professional print vendors offer proofing. It costs a small amount but prevents the much larger cost of reprinting an entire run with wrong colours.
What to Send Your Printer
Don't send: An RGB JPEG or PNG and hope for the best.
Do send:
- A print-ready PDF exported from Illustrator with CMYK colour mode, no colour profile embedding, or with the correct output intent profile
- Or an EPS file in CMYK
- Along with a reference Pantone swatch or CMYK values for each brand colour so the print operator knows what you're aiming for
Most professional printers will ask what CMYK values your brand colours should be. If you can't answer that question, it means your logo files were never prepared for print — which is worth addressing now before the next print job. See AI logo RGB to CMYK conversion for the technical detail on the conversion process.
Different Papers, Different Results
Even with correctly specified CMYK values, the same colour looks different on different paper stocks. A coated (glossy) paper produces more saturated, brighter colours than an uncoated (matte) paper because the ink sits on the surface rather than absorbing into it.
If your brand appears on both coated and uncoated materials — glossy business cards and letterhead, for example — you may need two slightly different CMYK specifications to achieve visual consistency across substrates. This is why professional brand guidelines often specify CMYK values for both coated (C suffix in Pantone) and uncoated (U suffix) versions of each colour.
This level of specification matters most for larger organisations producing high volumes of branded print. For small businesses, getting the CMYK conversion right and testing on a proof is usually sufficient.
The One Thing to Do Before Your Next Print Job
Before you send any logo file to a printer, ask yourself: are these CMYK values? If the answer is no — if you're working from a PNG, a JPEG, or a Canva export — get proper vector files with documented CMYK values before printing. The cost of getting this right once is far less than reprinting materials with wrong colours.
Getting your logo print-ready before the next job?
We convert logos to print-ready vector files with CMYK and Pantone colour specifications — so what you approved is what you get from the printer.
Your logo was designed in RGB (the colour system screens use, which mixes red, green, and blue light) but printing uses CMYK (cyan, magenta, yellow, and black inks). These are different colour systems with different ranges of reproducible colours. When your RGB file gets converted to CMYK automatically by a printer, the conversion algorithm approximates your screen colours in ink — and some colours, particularly vivid oranges, bright blues, and electric greens, shift noticeably in that conversion. The fix is to control the conversion yourself by specifying CMYK values manually rather than letting the printer convert automatically.
Open your logo in Adobe Illustrator and change the document colour mode to CMYK. Select each brand colour and adjust the CMYK sliders until the on-screen CMYK preview looks as close as possible to your intended colour. Document those exact CMYK values (for example, C:0 M:75 Y:80 K:0) and provide them to your printer. For critical colour work, also request a physical proof before approving the full print run — review it under daylight or a neutral light source, not on screen.
CMYK printing reproduces colours by overlaying tiny dots of cyan, magenta, yellow, and black ink — the combination creates the appearance of many different colours. Pantone printing uses a single pre-mixed ink that is standardised globally, so the colour is consistent across any printer and any country that uses the same Pantone number. Pantone is more accurate and consistent for brand colours but costs more and isn't available from all printers. For brand colours where precision matters across multiple vendors, Pantone specification is worth the investment.
For most small and medium businesses, well-specified CMYK values with a physical proof approval process is sufficient. Pantone is worth the additional cost when: your brand appears at significant print volume across multiple vendors and accuracy must be consistent, your brand colour is in a range where CMYK has difficulty matching accurately (vivid oranges, electric blues), or when your materials include offset printing where Pantone is practical. Digital printers (which produce most short-run business cards, brochures, and flyers) can't use Pantone ink — they simulate it with CMYK.
Send a print-ready PDF exported in CMYK colour mode from Adobe Illustrator, or an EPS file in CMYK. Do not send PNG or JPEG files for professional printing — these are typically RGB, may be lower resolution than required, and don't contain the colour profile information printers need. Along with the file, provide the CMYK values for each brand colour so the print operator has a reference target. If a printer asks for a 'high-resolution PDF,' they mean a CMYK vector PDF, not a screen-resolution export.
It depends on whether the error was the printer's fault or the file's. If you sent an RGB file and the printer converted it without telling you the colours would shift, there's a grey area — some printers will reprint, others won't. If you sent a correctly specified CMYK file and the printed result doesn't match the CMYK values, the error is the printer's and you have a clear case for reprinting. This is why documenting your exact CMYK target values and getting a proof approval before the full run matters — it establishes what was agreed and gives you a clear standard to hold the printer to.
Quick Answers
Mac displays, particularly Retina screens, have wide colour gamuts and tend to show colours as more vivid and saturated than they actually print. A coral that looks bright on a MacBook may look flat and muddy when printed in CMYK ink on paper. The solution is to evaluate print colours on a physical printed proof under neutral light — never on screen. A calibrated monitor reduces the gap but doesn't eliminate it.
Yes, significantly. Digital printers (most short-run business card and brochure printers) reproduce CMYK differently from offset printers, and each device is calibrated differently. The same CMYK values can print noticeably differently across vendors. For colour-critical work, always request a physical proof from the specific printer you'll use for the full run, not from a different device.
Pantone numbers are standardised colour identifiers for pre-mixed inks (e.g. Pantone 485 C is a specific red). If you specify Pantone 485, any printer with that ink produces exactly that colour, regardless of device. You need Pantone if your brand appears at volume across multiple vendors and colour consistency is commercially important. For most small businesses printing with one digital printer, correctly specified CMYK values plus a proof approval is sufficient.
No. Glossy (coated) paper produces more saturated, brighter colours because ink sits on the surface. Matte (uncoated) paper absorbs more ink, making colours appear softer and slightly less saturated. A rich orange on glossy card may look noticeably different on an uncoated letterhead. For brands that print on both, professional guidelines often specify different CMYK values for coated and uncoated substrates.
Probably not without conversion. Canva exports in RGB colour mode by default. When a print shop receives an RGB file, they convert it automatically — and brand colours, especially vivid ones, often shift noticeably in that conversion. Export from Canva as a PDF or SVG, then open it in Illustrator, convert to CMYK mode, adjust the colour values, and re-export as a print-ready PDF. If you don't have Illustrator access, a professional file conversion service can do this.
Screens emit light; print reflects it. Even a perfectly colour-managed file will typically appear slightly darker and less luminous in print because you're comparing emitted light (screen) to reflected light (paper). This is inherent to the difference between the two media. The fix is to view print colours under a neutral, daylight-balanced light source — not fluorescent office lighting, which makes colours look even different.