Color Science Built on Real Physical Pigments
Standard digital screen tools linearly average RGB light channels, turning mixtures into dull brownish-grey. PigmentLab models physical particle absorption and classical Bauhaus color theory—delivering vibrant, authentic color palettes for artists, UI designers, and educators.
Pigment Blending Studio
Blend custom proportion sliders with authentic subtractive light scattering. Experience Blue + Yellow yielding vibrant emerald Green, with real-time CSS color-mix() code generation.
Bauhaus Artist Wheel Studio
Explore Johannes Itten's classical 12-hue artist color circle where Red opposes Green and Blue opposes Orange. Features 9-step shade scales, WCAG 2.1 matrix scores, and color blindness simulations.
Why Subtractive Pigment Physics Beats Digital RGB Mixing
Digital monitors manipulate glowing light channels additively. Physical artist paints, however, obey the immutable laws of selective wavelength absorption.
Linear Averaging Degrades into Muddy Grey-Brown
Computer screens render colors through tiny glowing subpixels (Red, Green, Blue). When standard design software mixes blue (#0000FF) and yellow (#FFFF00), it simply calculates their mathematical midpoint: (128, 128, 128)—a washed-out, lifeless grey. Because screens project light rather than absorbing it, digital averaging fundamentally fails to replicate natural pigment interactions.
Selective Wavelength Filtering Yields Radiant Emerald Green
According to physical Kubelka-Munk theory, paint particles possess distinct absorption (K) and scattering (S) properties across visible wavelengths. Blue pigment absorbs red and yellow bands; yellow pigment absorbs blue and violet bands. The sole remaining reflected light is brilliant emerald green—exactly replicating natural oil and acrylic paints on canvas.
Four Pillars of Physics-Based Color Science
PigmentLab unites academic spectral physics with classical artistic harmony and modern web accessibility in a unified, professional suite.
Subtractive Spectral Absorption
Calculates physical absorption (K) and scattering (S) coefficients. Blend up to 6 custom pigment slots with 1%-100% continuous ratio controls.
Johannes Itten Bauhaus Wheel
Historical 12-hue artist wheel with Red opposing Green and Blue opposing Orange for authentic complementary, triadic, and split-complementary harmonies.
W3C CSS Color 4 & OKLCH Space
Perceptually uniform polar coordinates ensuring smooth, predictable chroma gradients and instant production-ready CSS color-mix() code generation.
WCAG 2.1 & Vision Deficiency Lenses
Real-time relative luminance calculation for AA/AAA compliance coupled with simulation filters for Protanopia, Deuteranopia, Tritanopia, and Achromatopsia.
Supported Standards & Optical Models
Every computation across PigmentLab is backed by peer-reviewed academic literature and official W3C web specifications.
Kubelka-Munk Theory (1931)
Two-flux radiative transfer differential equations modeling diffuse light reflectance and absorption in paint layers.
Johannes Itten RYB (Bauhaus 1961)
The foundational 12-hue color wheel governing geometric contrast relationships and balanced compositional palettes.
W3C CSS Color Module 4 (OKLCH)
Perceptually uniform color space aligning digital display rendering with human eye sensitivity curves.
W3C WCAG 2.1 (ISO/IEC 40500)
Mathematical relative luminance ratios (4.5:1 text, 3:1 graphical elements) guaranteeing inclusive digital experiences.
Explore Companion Color Tools & Optical Theory
Connect physical Kubelka-Munk pigment mixing with Johannes Itten Bauhaus color harmonies and accessibility testing.
Subtractive Paint Mixer & Hex Color Mixing Table
Blend real oil & acrylic pigments (Blue + Yellow = Green), test OKLCH or CMYK modes, and export CSS color-mix() snippets.
Johannes Itten Color Wheel & Complementary Palette Generator
Switch between artist RYB and RGB wheels, generate 9-step shade scales, simulate color blindness, and export Tailwind CSS v4 tokens.
How Kubelka-Munk Pigment Optics & Bauhaus Theory Work
Compare linear RGB light averaging against physical particle absorption and inspect our primary academic references.