What Are the Colors in the Visible Light Spectrum?

The colors in the visible light spectrum are commonly described as violet, blue, green, yellow, orange, and red. These colors correspond to different wavelength regions between approximately 380 and 780 nanometers. The boundaries are gradual rather than fixed, so the spectrum contains a continuous range of colors instead of only six separate bands.

Violet: The Shortest Visible Wavelengths

Violet occupies the lower end of the visible range, generally around 380–450 nm. It is less visually prominent than many other colors because human eyes have lower sensitivity near the edge of the spectrum.

Violet and near-violet LEDs may be used for specialized decorative effects, but output near the ultraviolet boundary should be clearly specified. Visible violet light and ultraviolet radiation are not the same, even though their wavelength ranges are adjacent.

Blue: Crisp and Visually Distinctive

Blue light generally falls between 450 and 495 nm. Blue LEDs are frequently used in architectural façades, fountains, landscape features, entertainment areas, and dynamic color-changing fixtures.

Blue is also important in producing white led light. Many white LEDs use a blue chip combined with phosphor materials. Part of the blue energy is converted into longer wavelengths, and the combined output appears white.

Large amounts of saturated blue can create strong visual contrast. Its intensity, mounting direction, surrounding ambient light, and duration of use should be controlled to prevent an outdoor installation from feeling uncomfortable or visually overpowering.

Green: Near High Human Visual Sensitivity

Green occupies approximately 495–570 nm. Human daytime vision is particularly sensitive within the green-yellow region, meaning optical power and perceived brightness do not increase at identical rates across all colors.

Green lighting is used for vegetation effects, themed environments, signs, and color-changing architectural scenes. However, illuminating plants with a narrow green LED does not necessarily make them look natural. The final appearance depends on the wavelengths reflected by leaves and the spectral composition of the light source.

Yellow and Orange: Transitional Warm Colors

Yellow typically extends from around 570 to 590 nm, followed by orange from approximately 590 to 620 nm. These colors create visually warm effects and may be selected for decorative architecture, hospitality environments, pathways, or identity lighting.

Amber LEDs are often positioned within the yellow-orange region, although the exact shade varies. Buyers should specify a dominant wavelength or approve a physical sample because descriptions such as yellow, amber, and orange may be interpreted differently.

The diffuser also affects perceived saturation. A clear optical cover can preserve a concentrated color, while an opal diffuser may soften the output and change its apparent intensity.

Red: The Longest Commonly Visible Wavelengths

Red occupies approximately 620–780 nm. It is widely used for accent lighting, warning functions, architectural features, seasonal scenes, and RGB systems.

Deep red light may appear less bright than green light at the same measured radiant power because the eye responds differently across the visible color spectrum. Product comparison should therefore use application-relevant photometric data rather than assuming equal electrical wattage produces equal visual brightness.

Why Are There No Hard Borders Between Colors?

A rainbow appears continuous because wavelength changes gradually. Terms such as blue-green, cyan, yellow-green, and red-orange describe transitional regions that are simplified when the spectrum is divided into a short list of named colors.

Individual perception, viewing brightness, surrounding colors, and surface reflection also influence where one color seems to become another. For manufacturing, measurable wavelength data provides more consistency than relying only on descriptive color names.

How Are Spectrum Colors Used in LED Products?

Single-color LEDs emit within selected wavelength bands. RGB fixtures combine red, green, and blue channels to create multiple colors, while RGBW adds a dedicated white channel for more practical general illumination.

An architectural LED lighting supplier should confirm the required color channels, wavelength tolerances, optics, output, control protocol, voltage, and environmental protection before production. KORS coordinates LED selection with drivers, housings, thermal management, and optical components so that Outdoor Wall Lights, Garden Lights, and landscape fixtures maintain consistent color across an installation.