Why Doesn't My Print Match My Screen? RGB vs CMYK Explained
Quick answer: Your screen makes colour by shining red, green and blue light (RGB). A printer makes colour by laying down cyan, magenta, yellow and black ink (CMYK) on paper. Light can produce brighter, more saturated colours than ink ever can, so some colours you see on screen simply can't be printed exactly. Vivid blues, bright greens and fluorescent oranges are the usual suspects. On top of that, every screen displays colour slightly differently, and paper, coatings and lamination all change the final result. The fix isn't to expect a perfect match to your monitor. It's to set files up correctly and match to a printed reference.
"Why doesn't it look like it did on my screen?" is probably the question we hear most often. It's a fair question, and the answer isn't that anyone has done anything wrong. It's physics. This guide explains what's going on, which colours are most affected, and what you can do about it before you print.
RGB and CMYK: Two Different Ways of Making Colour
RGB: colour made from light
Every screen, whether it's a phone, laptop or TV, builds colour by mixing red, green and blue light. Mix all three at full strength and you get white. Turn them all off and you get black. Because the screen is emitting light straight into your eyes, it can produce intensely bright, saturated colours.
CMYK: colour made from ink
Print works the opposite way. We start with white paper and lay down cyan, magenta, yellow and black (K) ink, which absorbs some of the light bouncing off the page. The more ink, the darker the colour. Paper can only reflect light back to you, it can't emit it, so the brightest colour print can produce is the white of the paper itself.
| RGB | CMYK | |
|---|---|---|
| Used for | Screens: websites, social media, presentations | Print: brochures, flyers, business cards, banners |
| Made from | Red, green and blue light | Cyan, magenta, yellow and black ink |
| How it works | Adds light (more = brighter) | Absorbs light (more = darker) |
| Colour range | Wider: very bright, saturated colours possible | Narrower: the most vivid screen colours can't be reproduced |
Which Colours Change the Most?
The range of colours a system can produce is called its gamut. RGB's gamut is wider than CMYK's, so any colour outside the CMYK range has to be converted to the nearest printable equivalent. In practice, these are the colours that shift the most:
- Bright, electric blues often print slightly duller, or drift towards purple.
- Vivid greens, especially lime and neon greens, lose their punch.
- Fluorescent and bright oranges and pinks print flatter. Standard CMYK inks simply can't reach neon brightness.
- Deep, rich purples can look muddier.
Skin tones, earthy colours, greys and most mid-tone colours convert very well. If your brand palette sits in those ranges, you'll barely notice the difference.
A real example: our own orange
We don't just see this with customers' artwork. Our own brand orange is a bright, vibrant colour, and it's one of the colours that sits right at the edge of what CMYK can reproduce. Here's the same design side by side: on the right as it looks on screen in RGB, and on the left after conversion to CMYK for print.
The printed version is a touch deeper and less luminous. Nothing has gone wrong. It's simply the most vivid orange ink on paper can produce. Knowing that in advance means there are no surprises, and it's exactly the kind of shift we point out before you approve your proof.
It's Not Just the Colour Mode: Five Other Things That Change Colour
1. Every screen is different
Your screen, your colleague's laptop and your client's phone will all show the same file differently. Brightness, colour settings, night mode and the age of the display all play a part. Most screens aren't calibrated, and many are set brighter and more saturated than reality. So "it looks different from my screen" can mean "it looks different from one screen".
2. The paper
Coated papers (silk and gloss) hold ink on the surface, giving sharper, more vibrant colour. Uncoated papers absorb more ink into the fibres, so colours look softer and slightly darker. Neither is wrong, but the same file will look different on each. Our coated vs uncoated vs recycled paper guide explains more.
3. Lamination and finishes
Laminating changes colour too. Matt lamination, for example, adds a very slight warm, yellowish tone and softens contrast. Gloss lamination makes colours look deeper and richer. A business card with matt lamination and an unlaminated brochure printed from the same file won't look identical.
4. The printing process
Digital presses, litho presses and wide format printers all use different inks and technology. We print brochures and stationery on our Konica Minolta AccurioPress digital presses, and banners on Epson and HP wide format machines. Each one reproduces colour a little differently, which is why our print technicians adjust each job on each machine when colour matters.
5. Spot colours (Pantone)
Many brands specify colours as Pantone references. On a litho press, a Pantone colour can be printed with a specially mixed ink. On digital presses, like ours, every spot colour is converted to CMYK. Most Pantone colours convert well. Some, particularly bright, metallic and fluorescent shades, can only be approximated. If your brand relies on one of those, talk to us before you print.
How to Get the Colours You Want in Print
Design in CMYK from the start
If a file is going to print, set it up in CMYK from the beginning. That way, what you see while designing is already limited to printable colours, and there are no surprises later. We recommend the Coated FOGRA39 colour profile (sometimes listed as ISO Coated v2). It's the standard European profile for coated paper, and you'll find it in Adobe InDesign, Illustrator and Photoshop.
Don't worry if you can't
If your artwork was designed in RGB, in Canva for example, that's fine. Converting RGB to CMYK is part of the free pre-flight check on every order. Our artwork check clearly notes the colour shift between RGB and CMYK and asks you to check your pre-flighted proof carefully before approving, so you see any change before anything is printed, not when the box arrives.
Watch your blacks
Black is where a surprising number of print problems start, because not all black is the same black in print:
- Flat black (C0 M0 Y0 K100) is for body text, small type, barcodes and fine lines. One ink gives crisp, sharp edges. On large areas, though, it can print as a dark charcoal rather than a solid black.
- Rich black adds cyan, magenta and yellow underneath the black for a deeper, denser result on backgrounds and large headlines. Our recommended mix is C60 M40 Y40 K100. Avoid it on small text, where four overlapping inks can make fine type look soft.
- Registration black (C100 M100 Y100 K100) is meant only for printer's crop and registration marks. Never use it in artwork: 400% ink coverage causes drying problems, smudging and set-off onto other sheets.
Match to a printed sample, not a screen
This is the single most useful thing you can do. If colour matters, send us something we've printed before, or a piece of your existing print that you're happy with. Our quotations include a colour critical option for exactly this: tick it, supply the sample, and we'll match to it on press. For regular customers, we keep samples on file and match colour as standard.
Ask for a printed proof on colour-critical jobs
A screen proof is great for checking content: spelling, phone numbers, layout. It can't show you true printed colour. For colour-critical or image-heavy jobs, a printed hard-copy proof shows you exactly how your job will look on the actual paper. We charge only for the materials and postage.
What We Do on Every Order
- Convert RGB and spot colours to CMYK as part of our free pre-flight check.
- Point out the RGB to CMYK colour shift on your proof, so you can check it before approving.
- Match to your printed sample when you tell us colour is critical.
- Keep samples on file for regular customers, so your print stays consistent from one order to the next.
- Adjust each job on each press, so your business cards, brochures and banners look like they belong together.
What we won't do is promise that print will look exactly like your screen, because nobody honestly can. What we can promise is that we'll tell you upfront where the differences will be, and get as close as physically possible to the colours your brand depends on.
Frequently Asked Questions
Why does my print look different from my screen?
Screens create colour with red, green and blue light (RGB), while printers use cyan, magenta, yellow and black ink (CMYK). Light can produce brighter colours than ink, so some screen colours can't be printed exactly. Screen settings, paper type and finishes such as lamination also affect how colours look.
Should I send my artwork in RGB or CMYK?
CMYK is best for print, as it shows you only printable colours while you design. If your file is in RGB, Print Studio Scotland converts it to CMYK as part of the free pre-flight check on every order, and asks you to check the colour shift on your proof before approving.
What is the best black for printing?
Use flat black (C0 M0 Y0 K100) for text, barcodes and fine lines. For backgrounds and large solid areas, use a rich black. Print Studio Scotland recommends C60 M40 Y40 K100. Never use registration black (100% of all four inks) in artwork.
Which colour profile should I use for print?
Print Studio Scotland recommends Coated FOGRA39 (also listed as ISO Coated v2), the standard European CMYK profile for coated paper.
Which colours are hardest to print?
Bright electric blues, vivid and neon greens, fluorescent oranges and pinks, and deep purples change the most when converted from RGB to CMYK. Skin tones, greys, earthy colours and most mid-tones convert very well.
Can you print Pantone colours?
On digital presses, Pantone and other spot colours are converted to CMYK. Most convert closely. Bright, metallic and fluorescent Pantone shades can only be approximated, so it's worth discussing them before printing.
How can I make sure my brand colours print correctly?
Supply a previously printed sample you're happy with and select colour matching on your quotation. For colour-critical jobs, ask for a printed hard-copy proof. Print Studio Scotland keeps samples on file for regular customers and matches colour as standard.
Why does the same colour look different on my business cards and my brochure?
Different papers, finishes and presses reproduce colour differently. Matt lamination adds a slight warm tone, uncoated paper softens colour, and wide format banners use a different printing process altogether. Printing everything in-house lets us adjust each job to keep them as consistent as possible.
Need a Hand With Your Colours?
If you're worried about how your artwork will print, send it over before you order and we'll tell you honestly what to expect. Call 0141 237 1924 or get in touch. Wondering what print actually costs? Read our honest brochure price guide.
Stuart Wilson, founder, Print Studio Scotland – 28 years in print