CMYK & RGB
What’s the difference?
Why your prints don’t match your screen
One of the most common frustrations in design is when a colour looks perfect on screen but comes out completely different in print. The reason for this usually comes down to colour modes: RGB and CMYK. Understanding how they work helps avoid the surprise of a duller, darker or shifted colour on the final print.
RGB: the colours of light
RGB stands for Red, Green and Blue. These are the three primary colours of light that screens use to create every shade you see. When light is added together at full strength, the result is pure white. That’s why digital images look so vibrant – they are lit directly by the screen. RGB has a much wider range of colours than print can reproduce, which is why you often see intense neon tones or glowing effects that are impossible to match on paper.
CMYK: the colours of ink
CMYK stands for Cyan, Magenta, Yellow and Key (black). Printers use these four inks to build up colour on paper. Unlike light, inks subtract brightness. Layering them together makes the colours darker, not lighter, with black used to add depth. Because CMYK relies on mixing physical inks, its colour range is smaller than RGB. This is why certain bright tones – especially luminous greens, pinks or blues – can’t be replicated in print.
Why colours shift between screen and print
When you design in RGB but send the file straight to print, the printer has to convert the colours to CMYK. During this process, some shades fall outside the printable range and are replaced with the closest match. The result is often less saturated or slightly different from what appeared on your monitor.
How to avoid print surprises
The safest way is to work in CMYK if the final output is print. This way, you see more accurately how the colours will behave. For digital-only projects such as websites, presentations or social media, stick to RGB.It’s also important to remember that screens vary in brightness and calibration. A colour viewed on one laptop may not look the same on another. For critical projects like branding or packaging, requesting a printed proof before the full run is the best way to check accuracy.
In short
Think of RGB as the language of screens and CMYK as the language of print. Choosing the right mode at the start of a project keeps colours consistent and prevents unexpected results.
DESIGN MADE SIMPLE
Design is about exploring possibilities, creating clarity, and bringing ideas to life. Every project has its own challenges, and thoughtful design can make all the difference. There’s always something new to try or learn, whether it’s in print, web, or branding. If you’d like help with a project, contact me.
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