Colors are everywhere, but they don’t always look the same on screens, in print, or in real life. That’s because different industries use different colour systems to define, mix, and reproduce colors. Each system has its own rules and methods for describing colour, whether it’s created with light, ink, or pigment. Understanding these systems helps keep colors consistent and true to your vision across different media and materials.

Color system explained briefly

A colour system is a standardized method to describe and reproduce colors, helping ensure colour consistency between devices and print outputs. Common systems include RGB for screens, CMYK for printing, and Pantone for exact colour matching.

Index

Inhaltsverzeichnis

1 Definition: Color system
2 Overview of important colour systems
3 Print colour
4 Why are there so many colour systems?
5 FAQs

Definition: Color system

A colour system is a standardized method for organizing, describing, and reproducing colors. It defines how colors are created, displayed, or printed using a specific model or structure. Color systems help ensure colors look the same across different devices, materials, and production processes.

In general, a colour system consists of:

A colour model = mathematical way to define colors
A colour space/palette = practical application of the model, providing specific colors

Color systems are essential in design, printing, and manufacturing to ensure colour consistency and avoid misunderstandings about how a colour should appear.

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Overview of important colour systems

There are various colour systems, each serving a specific purpose. In the following sections, we will briefly explain the most important ones.

RYB

The RYB model stands for “red, yellow, blue” and is known as the traditional subtractive colour model. It was widely used in art and design long before modern printing systems were developed.

In this model, red, yellow, and blue are considered the primary colors. By mixing them, the secondary colors are created.

RYB is mainly used in:

Art and painting
Color theory education
Traditional design and crafts

It is especially common in schools and art classes to teach the basics of colour mixing because it’s simple and easy to understand. However, RYB is not used in professional printing or digital design because it does not cover the full range of visible colors and is less precise than systems like CMYK or RGB.

Example

When an artist mixes red and yellow paint, they get orange.

The RYB model was the foundation for early colour wheels and influenced the development of modern colour theory. Even though it’s outdated for technical purposes, it still plays an important role in artistic practice and education.

RGB

The RGB colour model is an additive colour system used primarily for digital displays like computer screens, TVs, smartphones, and cameras. It is based on the three primary light colors: red, green, and blue.

In the RGB model, colors are created by combining red, green, and blue light at different intensities. When all three colors are combined at full intensity, the result is white light. When no light is emitted, the result is black.

RGB is the standard colour system for:

Digital design
Screens and monitors
Photography and video

In the RGB model, colors are defined by three numbers, one for each primary colour. Each value ranges from 0 to 255, representing the intensity of the colour. While 0 means no intensity, 255 means full intensity. This numeric system allows millions of possible colour combinations on digital screens.

Example

A website’s colour code is defined as (255, 0, 0), meaning pure red.

The RGB model cannot be used for printing because it is based on light emission, while printed colors use reflected light. RGB colors must be converted to CMYK, which can cause slight colour shifts.

What about hex codes?

Hex codes are not a separate colour system. They are simply a way to write RGB colors in a compact, hexadecimal format.

Examples

#FF0000 = RGB(255, 0, 0) = Bright red
#0000FF = RGB(0, 0, 255) = Bright blue
#00FF00 = RGB(0, 255, 0) = Bright green

Hex codes are widely used in web design and digital graphics because they are easy to read and supported by all browsers and design tools.

Munsell colour system

The Munsell colour system is a scientific and visual way to organise colors, developed by artist and educator Albert H. Munsell in the early 20^th century. Unlike traditional colour wheels, this system is based on how humans actually perceive colour.

The Munsell system defines each colour using three properties:

Hue: Type of colour (red, blue, green, etc.)
Value: Lightness or darkness of colour
Chroma: Color intensity or purity

The Munsell system is used in:

Art and design education
Manufacturing and quality control
Soil science, agriculture, and food industries

This system is valued because it focuses on how people perceive colour, making it easier to compare shades without relying on technical colour codes or digital devices.

Example

A soil scientist uses the Munsell soil colour chart in the field to accurately classify and record the colors of soil samples.

An interesting fact about the Munsell system is that it was one of the first colour systems based on human visual response, and it influenced the development of modern colour spaces like CIELAB.

HSL, HSV & HSLA

The HSL and HSV colour models are both ways to represent colors digitally based on how humans perceive them. They are alternative versions of the RGB model but use different parameters that are often easier to adjust for designers.

HSL means hue, saturation, and lightness.

Hue: Color type (measured in degrees from 0° to 360° around a colour wheel)
Saturation: Intensity of the colour (0% = gray, 100% = full colour)
Lightness: How light or dark the colour is (0% = black, 100% = white)

HSV stands for hue, saturation, and value. It’s similar to HSL but uses value instead of lightness.

Value: Brightness of the colour (0% = black, 100% = full brightness)

HSLA means hue, saturation, lightness, and alpha. It’s the same as HSL but with an added alpha value.

Alpha: Transparency of the colour (0 = fully transparent, 1 = fully opaque)

These models are typically used in:

CSS styling
Web design
Digital illustration tools
Anywhere designers want to adjust colour tones visually and intuitively

They are especially helpful when creating colour palettes, adjusting brightness, or fine-tuning transparency.

Examples

HSL: hsl(39, 100%, 50%) → Strong, warm orange (close to a honey or amber tone)
HSV: hsv(300, 75%, 80%) → Bright magenta (mix between purple and pink)
HSLA: hsla(200, 100%, 50%, 0.5) → Intense pink (often called fuchsia or hot pink)

Even though HSL and HSV are based on RGB, many designers prefer using them because they make it easier to adjust colors visually, for example, making a colour lighter without affecting its hue.

CMY & CMYK

The CMY colour model stands for cyan, magenta, and yellow and is a subtractive colour model used in colour printing. It’s called “subtractive” because colors are created by removing light when printing inks are layered on a white surface.

The extended version, CMYK, adds black (key). The black ink improves contrast and depth and helps achieve true black tones, which are difficult to produce by mixing only cyan, magenta, and yellow.

CMY is mostly theoretical and rarely used alone. CMYK, on the other hand, is the standard colour system used in:

Professional printing
Books, magazines, and brochures
Packaging and marketing materials

It’s essential for any printed material, as digital colors like RGB cannot be printed directly.

In the CMYK model, colors are written as four values. These are shown in percentages because they describe how much of each ink is applied in the printing process. This system helps many types of printers mix the correct amount of each colour to achieve the desired result on printer paper.

Example

CMYK(100%, 0%, 0%, 0%) → A bright cyan

An interesting fact about CMYK is that it can produce a wide range of colors, but not as many as RGB. This is why some vibrant screen colors cannot be perfectly reproduced in print. They autumn outside the CMYK colour gamut.

Pantone colors

The Pantone Color System, also known as the Pantone Matching System (PMS), is a standardized reproduction system. It was developed to help designers, manufacturers, and printers communicate and reproduce exact colors, regardless of the equipment or materials used.

Pantone colors are also called spot colors. Unlike CMYK, which mixes colors during the printing process, Pantone uses pre-mixed inks.

Pantone is widely used in:

Packaging and product design
Branding and corporate design
Fashion, interior design, and industrial design

An interesting fact is that Pantone announces a Color of the Year and trend palettes, which often influence the design, fashion, and marketing industries.

Examples

Here are the Colors of the Year from recent years.

2025: Mocha Mousse (17-1230)
2024: Peach Fuzz (13-1023)
2023: Viva Magenta (18-1750)
2022: Very Peri (17-3938)
2021: Ultimate Gray (17-5104)
2020: Classic Blue (19-4052)

Pantone colors are identified by a two-part code, as shown in the examples above. The first two digits indicate the colour family or lightness level. Lower numbers stand for lighter tones, while higher numbers stand for darker shades. The four digits after the hyphen represent the specific colour. In some cases, a letter code is added to show the material or finish (e.g., TCX for textiles, C for coated paper).

RAL

The RAL colour system is a standardized colour-matching system developed in Germany in the 1920s. The system is based on predefined colour samples rather than formulas. Each colour is assigned a four-digit code and a name, making it easy to reference and reproduce.

RAL colors are commonly used in:

Architecture and construction
Industrial products and machinery
Traffic signs, furniture, and vehicles

It is not used in digital design or printing but for physical materials like paints and plastics.

In the RAL system, each colour has a four-digit number. The first digit indicates the colour family (e.g., 1 = yellow, 3 = red). The next three digits identify the specific shade using an internal numbering system.

Example

A well-known RAL colour is RAL 3020 Traffic Red.

The most widely used collection is the RAL Classic palette with 213 colors. Unlike Pantone or CMYK, RAL colors are meant for physical products, ensuring consistent colour appearance across surfaces.

Print colour

The most suitable colour system for printing is CMYK because it is specifically designed for the physical mixing of inks. CMYK is used in almost all professional printing processes, as it works by layering coloured inks on white paper. The colors are created by subtracting light. The more ink applied, the darker the result. This makes CMYK the foundation for achieving accurate and consistent print colour.

For projects that require precise and consistent colors, such as logos and branding, the PMS is also widely used. Pantone colors are made from pre-mixed spot inks, ensuring that the printed colour is always the same, regardless of the printer or material.

You may wonder, why not use RGB?

The RGB model is used exclusively for digital displays and cannot be accurately reproduced in print. RGB is additive, meaning it creates colors by mixing light, not ink. When digital files are printed, they must be converted from RGB to CMYK, which often results in colour shifts or reduced vibrancy if not prepared correctly.

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Why are there so many colour systems?

The reason there are so many colour systems is that different industries and technologies have different needs when it comes to colour.

Examples

Digital screens use RBG because they create colors with light
Printers use CMYK because they create colors with ink on paper
Artists and educators use RYB or Munsell to explain and teach how colors theory
Designers and manufacturers use Pantone or RAL to ensure that a specific colour looks the same on different materials

There is no single colour system that can cover all purposes because colour behaves differently depending on whether it is produced by light, ink, paint, or other materials.

Additionally, some colour systems focus on technical precision (like CMYK or RGB) while others focus on visual appearance and perception (like HSL, HSV, or Munsell).

Note: There are so many colour systems because colour is complex, and each system solves a different problem. Whether it’s about how we see colour, how we mix it, or how we reproduce it in print, on screens, or in physical products.