CMYK vs RGB: Which Color Mode for Print?
By Long Island Custom Printing · Huntington, NY · Updated May 2026
CMYK for print, RGB for screen. What happens if you skip the conversion, and how to do it correctly in Illustrator, Photoshop, and Canva.
TL;DR
Print files should be CMYK. Screens display in RGB (additive light); presses print in CMYK (subtractive ink). The CMYK gamut is smaller than RGB, so vivid screen colors — especially electric blues, neon oranges, and pure greens — shift visibly when converted. Convert to CMYK in your design app before exporting so you control the result rather than letting the print shop's software guess. In Illustrator: File > Document Color Mode > CMYK. In Photoshop: Image > Mode > CMYK. Canva Pro converts at PDF for Print download.
What are CMYK and RGB?
RGB stands for Red, Green, Blue. It is an additive color model — pixels on a screen emit colored light, and combining all three at full intensity produces white. Phones, monitors, TVs, and web browsers all display in RGB.
CMYK stands for Cyan, Magenta, Yellow, and Key (black). It is a subtractive color model — ink on paper absorbs (subtracts) wavelengths of light, and combining all four near full saturation produces a deep brown-black. Commercial offset and digital presses print in CMYK.
The two models do not have the same range of colors. RGB has a larger gamut, meaning it can display colors that CMYK ink cannot reproduce. The phrase "out of gamut" describes colors that exist in RGB but have no exact match in CMYK — the press has to pick the closest approximation, and that approximation is often noticeably duller.
Why this matters for print quality
The colors most likely to shift are the vibrant ones: bright cyan-blue Twitter logos, electric purple, neon orange, fluorescent green, and saturated red. On a screen these pop. On paper they often dull, sometimes dramatically.
The reason: those colors are reproduced on screen by maxing out one or two RGB channels (a pure RGB blue is 0, 0, 255). To approximate that blue in CMYK, the press uses a heavy cyan plus some magenta. The combination on paper looks closer to a deep navy than the electric blue you started with.
If you convert to CMYK yourself in your design app, you can see the shift on screen and adjust. If you submit RGB, the printer's RIP software converts at production time using a default profile, and you do not see the result until the proof or the printed piece.
Brand colors are the highest-stakes case. A logo with a specific Pantone or hex value that lives in RGB land may not be reproducible exactly in CMYK. The fix is either accepting the CMYK approximation, or using a Pantone spot color if the press supports it (most commercial digital presses do not — they are CMYK only).
How to convert RGB to CMYK correctly
Illustrator
File > Document Color Mode > CMYK Color. Then check the swatches panel — any swatches still labeled "RGB" should be updated. Placed raster images may still be RGB; export the file as PDF/X-1a and Illustrator will convert them at export.
Photoshop
Image > Mode > CMYK Color. Before converting, turn on View > Proof Colors (Cmd/Ctrl + Y) with the working CMYK profile selected — this shows you the converted appearance without committing. Adjust saturation on out-of-gamut areas before converting.
InDesign
New documents default to CMYK when created with a print intent. Confirm File > Document Setup > Intent: Print. Each placed image keeps its own color profile, so source images should already be CMYK or you should let the PDF export convert them via the PDF/X-1a preset.
Canva
Canva works in RGB internally. Canva Pro users: download as "PDF for Print" with the CMYK option selected (Pro feature) — Canva converts at export. Canva Free does not offer CMYK download; the print shop converts on its end, and color shift is more likely.
Affinity Designer / Publisher
Document > Convert Document > CMYK. Affinity also supports a soft-proof view to preview the CMYK conversion before committing.
Common mistakes
- Designing in RGB the whole time and only converting at export. The screen colors during design were the RGB versions, so the final CMYK piece does not match what you approved visually. Convert early, design in CMYK.
- Using a hex code for a print job. Hex codes are RGB. If your brand spec is "#0066CC" only, ask for the CMYK equivalent (often 100/50/0/0 or similar) and use that.
- Letting the print shop convert. The conversion will happen either way — the question is whether you control it. Convert yourself so the on-screen design matches the printed result.
- Forgetting placed images. An Illustrator document set to CMYK can still contain an RGB JPG. Check linked files individually.
FAQs
What is the difference between CMYK and RGB?
RGB (Red, Green, Blue) is an additive color model used for screens — pixels emit light. CMYK (Cyan, Magenta, Yellow, Key/Black) is a subtractive color model used for print — ink absorbs light. The two have different color gamuts, so some bright RGB colors cannot be reproduced exactly in CMYK.
Why does my file need to be in CMYK for printing?
Commercial presses lay down cyan, magenta, yellow, and black inks. The press separates the file into four plates by channel. A file submitted in RGB has to be converted before plates are made, and that conversion is done by software, not by you — so the results are unpredictable, especially for saturated blues, oranges, and greens.
What happens if I send an RGB file to the printer?
The printer's RIP software converts it to CMYK automatically using a default profile. Saturated blues often shift toward purple, vibrant oranges dull toward brown, and bright greens lose their punch. The print will not match what you saw on screen. Convert to CMYK yourself so you control the result.
How do I convert RGB to CMYK in Photoshop?
Image > Mode > CMYK Color. Photoshop will warn you if any out-of-gamut colors will shift. Use the View > Proof Setup > Working CMYK preview before exporting to see the converted appearance.
How do I convert RGB to CMYK in Illustrator?
File > Document Color Mode > CMYK Color. Then check each placed image — if a raster image was placed in RGB, you may need to convert that separately in Photoshop. Native vector colors convert immediately.
Can I print in CMYK from Canva?
Canva works internally in RGB. Canva Pro's "PDF for Print" export converts to CMYK at download. Canva Free exports RGB only — the print shop converts on its end. Expect some color shift on bright colors if you use Canva Free for print.
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