Wavelength
White light contains all visible wavelengths of the electromagnetic spectrum (approximately 380-750 nanometers). It's the combination of all colors in equal proportions, creating the perception of colorless light that appears white to the human eye.
Light Reflectance
Pure white reflects approximately 80-90% of visible light, making it the most reflective color. This high reflectance value makes white ideal for maximizing natural light in spaces, reducing energy consumption, and creating bright, airy environments in architecture and design.
Color Temperature
White light varies in color temperature, measured in Kelvin (K). Warm white (2700-3000K) has yellow tones, neutral white (3500-4100K) is balanced, and cool white (5000-6500K) has blue tones. Color temperature affects mood, productivity, and visual comfort in lighting design.
Digital Display
In digital displays, white is created by activating all RGB subpixels at maximum intensity (255, 255, 255). The quality of white varies between display technologies (LCD, OLED, LED) and depends on factors like backlight quality, color gamut, and calibration settings.
Print Production
In print, white is typically the absence of ink, relying on the paper's natural color. For special effects, opaque white ink or spot white can be used on colored or transparent substrates. The quality of white in print depends on paper brightness, opacity, and coating.
Pigments & Materials
Common white pigments include titanium dioxide (TiO2), zinc oxide (ZnO), and lead white (historical). Titanium dioxide is the most widely used due to its excellent opacity, brightness, and durability. White pigments are essential in paints, plastics, cosmetics, and paper production.
Opacity & Coverage
White pigments offer excellent opacity and hiding power, effectively covering underlying colors and surfaces. This property makes white essential for primers, base coats, and correction in various applications from painting to digital design, where white is used to mask or reset visual elements.
Perception & Vision
Human perception of white is relative and context-dependent. The brain interprets white based on surrounding colors and lighting conditions through chromatic adaptation. What appears white in one context may appear tinted in another, demonstrating the subjective nature of color perception.