Color Converter
A color approved on screen is rarely the same color approved in print. That gap has existed for decades and continues to be responsible for a significant amount of rework in graphic design projects.
The reason is technical. Screens emit light; print absorbs it. What the eye sees in each case is the result of different physical processes, and no monitor replicates with absolute precision what will happen on paper or on plastic packaging.
RGB to CMYK conversion is where most projects waste time and money. A vibrant blue in RGB can turn into a dull blue in CMYK if the conversion uses the wrong profile. Saturated red in RGB frequently loses intensity in four-color printing. Lime green is one of the most problematic colors because it depends heavily on the final substrate.
Contrast checking is the other critical point. Text on a colored background needs to meet a minimum contrast ratio to be legible under varying light conditions. In packaging, this affects legal text, usage instructions, and any mandatory information.
Frequently Asked Questions
Why do colors look different on screen and in print?
Screens emit light using RGB (red, green, blue) — an additive color model. Print absorbs light using CMYK inks (cyan, magenta, yellow, black) — a subtractive model. Because the underlying physics differ, the same color value produces different visual results in each medium. Some RGB colors, especially saturated blues, greens, and oranges, simply cannot be reproduced in CMYK and will appear duller in print.
What is the correct way to convert RGB to CMYK for packaging?
The safest approach is to work in CMYK from the beginning of the project if the final output is print. When converting from RGB, use the color profile recommended by your print supplier — typically ISO Coated v2 for offset printing in Brazil and Europe. Automatic conversions without a correct profile frequently shift hue and reduce saturation, especially for warm reds and vibrant blues.
What is a HEX color code?
HEX is a six-character code used in web and digital design to represent a color in the RGB model. Each pair of characters represents the intensity of red, green, and blue on a scale from 00 to FF. For example, #2DB560 is a green composed of 45 red, 181 green, and 96 blue. HEX codes are the standard format for CSS, HTML, and most digital design tools.
What is WCAG contrast and why does it matter in design?
WCAG (Web Content Accessibility Guidelines) contrast ratio measures the legibility difference between text and its background. A minimum ratio of 4.5:1 is required for normal text at AA level accessibility. In packaging, contrast affects not only digital accessibility but also the legibility of mandatory printed information — usage instructions, ingredient lists, warnings — under different lighting conditions at the point of sale.
What is a Pantone color and when should I use it?
Pantone is a standardized color system used in print to ensure consistency across different presses and suppliers. Unlike CMYK, which mixes four inks, a Pantone color is printed as a single pre-mixed ink. It is used when a brand color must be reproduced exactly — for example, a logo on packaging. Pantone is also the only reliable way to reproduce colors that fall outside the CMYK gamut, such as metallic or fluorescent shades.
What is the difference between HSL and HSB color models?
Both HSL (Hue, Saturation, Lightness) and HSB/HSV (Hue, Saturation, Brightness/Value) are cylindrical color models designed to be more intuitive than RGB. The difference is in how they define the brightest colors: in HSL, full saturation at 50% lightness gives the purest color; in HSB, full saturation at 100% brightness gives the purest color. HSB is more commonly used in design tools like Photoshop and Illustrator.