Color and light

What Is The Relationship Between Light And Colour?


What Is The Relationship Between Light And Colour?

Share this article
The relationship between light and colour is that light is necessary for us to see colour. When light enters our eyes, it is processed by the brain and interpreted as the colours we see. Most of the objects around us that have colour do not actually create the colour themselves, but instead reflect certain wavelengths of light that our brain perceives as certain colours. Without light, there is no colour.


The relationship between light and color is a fascinating one that encompasses the science of physics and the art of design. Understanding how colors are formed, how they interact with one another, and how they affect our mood and perception is key to creating beautiful and effective visual designs.

What Is Color?

Color is an attribute of light that is visible to the human eye. It’s created by the interaction of light waves with objects or surfaces. When light hits an object, some of it is absorbed while some is reflected. The color we perceive is determined by which wavelengths are absorbed or reflected by the object.

The three basic components of color are hue, saturation, and brightness. Hue refers to the specific shade of color (red, blue, green, etc.), saturation refers to how intense or pure the color is, and brightness refers to how much light reflects off it.

What Is Light?

Light is a form of energy that travels in waves through space. It’s made up of electromagnetic radiation that includes visible light as well as non-visible forms like ultraviolet rays and X-rays. The speed at which light travels through space is constant at 299,792 kilometers per second.

The wavelengths of visible light range from approximately 400 nanometers (nm) for violet to 700 nm for red. Each wavelength corresponds to a specific hue on the color spectrum.

The Relationship Between Light And Color

The relationship between light and color can be explained by two main theories: additive color theory and subtractive color theory.

Additive color theory states that when different colors of light are combined (such as red, green, and blue), they create new colors. This type of color mixing is used in devices like computer screens, TVs, and projectors.

Subtractive color theory, on the other hand, states that when colors are combined by mixing pigments (such as paint or ink), they subtract wavelengths from the light that’s reflected off the surface. The resulting color is determined by which wavelengths are absorbed and which are reflected. This type of color mixing is used in printing and painting.

The Psychology Of Color

Colors can have a profound effect on our emotions, mood, and behavior. Different colors can evoke different responses in people based on their experiences, cultural background, and personal preferences.

For example, blue is often associated with calmness and serenity while red is associated with passion and energy. Yellow is often associated with happiness and optimism while green is associated with nature and balance.

Marketers have long used the psychology of color to influence consumer behavior. It’s been shown that colors can affect our purchasing decisions up to 90%. Brands frequently use specific colors to create a connection with their target audience or to evoke certain emotions.

The Importance Of Color In Design

In design, color plays a crucial role in creating visual interest and communicating messages effectively. Different colors can be used to convey different meanings or create a certain mood.

The use of complementary colors (colors opposite each other on the color wheel) can create dynamic contrast while analogous colors (colors adjacent to each other on the color wheel) can create harmony. The use of warm colors (reds, oranges, yellows) can create excitement or energy while cool colors (blues, greens) can create calmness or relaxation.


The relationship between light and color is complex but fascinating. Understanding how they interact with one another is key to creating effective designs that communicate messages clearly while also engaging the viewer emotionally.

By considering the psychology of color, the principles of color theory, and the importance of color in design, designers can create compelling visuals that stand out and have a lasting impact on their audience.

UX Rave : Photo | Color theory, Color psychology, Color harmony

Nicely designed diagram of a few colour relationships on colour wheels …

Newtonian Color Wheel | Reflection and refraction, Color wavelengths …

Why a Dark Sky Matters | KQED

Which colour of light is the best for photosynthesis? – Quora

Modern Colour Workshop, an extract – Raspberry Spool

Wavelength Of Red Light / Quia – GENERAL CHEMISTRY – The …

The Vedic Wisdom:: The knowledge of unknown: Light Wavelength Info

PPT – BASIC COLOR REVIEW PowerPoint Presentation, free download – ID …

wavelength.jpg (JPEG Image, 450 × 285 pixels)
Visible Light Spectrum Explained – Wavelength Range / Color Chart Diagram – Chemistry
This chemistry video tutorial explains the visible light portion of the electromagnetic spectrum. It discusses the wavelength of light in nm that corresponds to the different colors of the rainbow. This video contains plenty of examples and practice problems. Here is a list of topics: 1. Visible Light Spectrum Color Chart Diagram 2. Red Light …

Leave a Reply

Your email address will not be published. Required fields are marked *