Process color: four inks building every shade
Process color is CMYK printing: cyan, magenta, yellow and black ink, layered in tiny dots that your eye blends into millions of shades. Almost everything in commercial printing — photos, flyers, packaging, most logos — is printed this way, because four inks can approximate nearly any color a design needs.
Spot color: one single, pre-mixed ink
A spot color (most often a Pantone color) is a single ink, mixed to an exact, standardized formula before it ever touches the press. Instead of four dot patterns approximating a shade, the press lays down one solid, consistent color. The tradeoff: a separate ink (and often a separate press run or plate) for every spot color used, which costs more than adding it to an existing CMYK run.
Why this matters for a logo specifically
A logo's exact color is usually the single most brand-sensitive color a company owns. CMYK can get close to most brand colors, but "close" can mean a visibly different shade between two print runs, two printers, or two paper stocks — CMYK dot patterns are more sensitive to that kind of drift than a single pre-mixed ink is. That's why many brand guidelines specify both a CMYK build (for everyday mixed-color printing, like a brochure with photos) and a Pantone spot color (for anything where the exact brand color has to match precisely, like a sign, a branded product, or a large flat area of color).
How to tell which your project needs
- Use process (CMYK) when the piece has photos, gradients, or many mixed colors together — a flyer, a packaging label, most everyday print jobs.
- Use spot color when one exact, consistent color matters more than cost — a logo on a sign, a single-color shirt print, a large solid-color background where even a slight shift would be obvious.
- Many logo files carry both: a CMYK build for general use, and a named Pantone spot value documented alongside it for anything where exact color consistency is worth the extra cost.