Color Wave Frequency

Frequency is a physical quantity measured in terahertz (THz), which indicates how many times an electromagnetic wave oscillates in one second.

In the case of visible light, this frequency determines the color perceived by the human eye.

The visible spectrum generally ranges from 384 THz, corresponding to red, to 789 THz, associated with violet.

Converting a frequency value in terahertz (THz) to a visible color on a screen, expressed as red, green, and blue (RGB), is not based on a universal formula.

Color perception varies slightly among individuals, making it difficult to establish an exact correspondence.

Nevertheless, there is a consensus on the approximate frequency ranges that make up the visible spectrum of light:

— 384–484 THz (Red)

— 484–508 THz (Orange)

— 508–526 THz (Yellow)

— 526–606 THz (Green)

— 606–668 THz (Blue/Cyan)

— 668–789 THz (Violet/Blue)

Some colors do not have a specific frequency because they do not correspond to light composed of a single frequency (so-called monochromatic color).

Since these colors do not appear directly in the visible luminous spectrum, dCode seeks to approximate their representation based on a proximity measurement called Delta E distance.

The electromagnetic spectrum includes many frequencies that are invisible to the human eye, categorized as follows:

— < 300 GHz: Radio waves and microwaves (used for communication, radio, Wi-Fi, radar).

— 300 GHz – 384 THz: Infrared (IR), perceived as heat, used in night vision and remote controls.

— 384 – 789 THz: Visible light.

— > 789 THz – 30 PHz: Ultraviolet (UV), can cause sunburns, used for sterilization.

— 30 PHz – 30 EHz: X-rays, can penetrate soft tissue, used in medical imaging.

— > 30 EHz: Gamma rays, very energetic, emitted by nuclear or astrophysical processes.

These radiations have various applications but do not produce direct visual perception.