Colour begins with light. On screens, colours are created using light itself – tiny combinations of red, green and blue that blend to form everything from subtle skin tones to vivid neon hues. In printing, however, colour takes on a different life. Instead of light, it relies on ink – typically cyan, magenta, yellow and black – layered in precise patterns to absorb and reflect light in just the right way. This is the fundamental difference between RGB and CMYK colour systems.
This shift from light to ink is where the magic (and challenge) lies. A colour that glows on a screen may appear duller in print, not because it’s wrong, but because it exists in a different medium. Printers must constantly translate between these two worlds, ensuring that what a customer sees, is as close as possible to what they get. This process is often referred to as converting RGB to CMYK for print.
Beyond the technical side, colour carries emotion and meaning. A deep navy can suggest trust and professionalism, while a bright yellow might evoke energy and optimism. In printing, these choices are permanent – once ink meets paper, there’s no undo button – so getting it right matters. Understanding RGB and CMYK helps ensure colour expectations are realistic.
In the end, printing is a blend of art and engineering. It’s about understanding how colour behaves, respecting its limitations, and using that knowledge to create something tangible, lasting and visually compelling. Knowing when RGB can or cannot be used, is essential for accurate print results.
Your screen uses light to make colours look extra bright. Printing uses ink, so some colours will look slightly different on paper. This is why RGB colours often appear more vibrant than CMYK in print.
🚫 Common Customer Misconception
❌ “It looked brighter on my phone – something is wrong with the printer”
✔ Reality: It’s a colour system difference, not a printing error
The most common sources of RGB colour are when clients design and import from non-design programmes as in standard msOffice, or they use the free version of Canva which only allows RGB and finally, many designers live in the world of web-based design and overlook the need to convert to CMYK. This is a common issue when RGB files are sent for CMYK printing.
The size of the RGB colour gamut is considerably bigger than the CMYK colour space but one can achieve totally acceptable results with CMYK printing. However one does need to have realistic expectations and understanding of the fundamental differences between the two different colour models.
What We Do in Store to Convert RGB to CMYK
- Convert artwork from RGB to CMYK
- Adjust colours where needed
- Offer proofs when colour is critical
Added to the above is the effect of paper, the requirement to correctly represent corporate colours and the strengths and weaknesses of the different printing processes. It is hence essential to work closely with your printer and a technically aware designer to get the desired results. This ensures your RGB to CMYK conversion delivers the best possible print outcome.
🧠 Golden Rule
If it’s going on paper, it should be in CMYK.
