CMYK stands for Cyan, Magenta, Yellow, and Key (black) – the four ink colors used in most color printing. It's a subtractive color model, meaning colors are created by layering inks that absorb light, unlike the additive RGB model used on screens.
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Designers convert digital files to CMYK before sending them to print, since RGB colors don't always translate accurately to ink. Getting this right helps avoid unpleasant surprises, like colors looking duller or different than expected once printed.

Why does CMYK matter?

If you design anything meant for physical print, like business cards, packaging, or posters, working in CMYK from the start (or converting carefully before export) keeps colors predictable. Bright RGB colors like neon blues or vivid greens often fall outside the CMYK gamut and print noticeably duller.

Most design software, like Photoshop or Illustrator, lets you switch the color mode to CMYK and preview how a design will look once printed. Checking this early saves time, money, and a lot of frustrating reprints.

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