Human vision responds to a limited band of electromagnetic radiation, roughly 380 to
700 nanometers. Shorter ultraviolet and longer infrared wavelengths still exist, but
they are outside normal human color vision.
Perceptual map
The wheel bends relationships
A color wheel connects red back to violet through purples and magentas. That bridge is
perceptual: purple is a real experience, but not one single spectral wavelength.
Experiment 02
CMY vs RYB contrast proposal
Compare a digital CMY/RGB wheel with a painterly RYB wheel so proposed contrast
colors and mapped same-color distances can be judged side by side.
RYB display
Lets RYB create its own equal-angle contrast proposal.
Wheel color mode
Uses vivid screen hues so the geometry and contrast spacing are easier to compare.
Wheel comparison
Complementary: two different contrast readings
Markers now appear directly on the wheels: the larger marker is the base color, and
the smaller markers are the proposed contrast colors for the selected relation. The RYB
wheel converts the same selected color into painter-wheel coordinates, so yellow-to-red
movement occupies the larger RYB band. The wheel color mode can either isolate vivid hue
geometry or use a primary-base approximation.
CMY / screen wheel
Digital contrast
Oppositions are calculated as equal angle distances on a screen-style hue wheel.
RYB / painter wheel
Painterly contrast
Oppositions are shown on a red-yellow-blue tradition, so the suggested contrast can shift.
CMY proposal
Basehsl(60 60% 50%)+180°hsl(240 60% 50%)
RYB proposal
Basehsl(60 60% 50%)+180°hsl(285 60% 50%)
Coming next
Small interactive experiments
03
Line of purples visualizer
Show how purple and magenta bridge red and violet without being single-wavelength colors.
04
Metamerism demo
Compare two matching colors that separate under different light-source assumptions.
05
Gamut clipping playground
Explore why vivid screen colors can shift or dull when translated to print or pigment approximations.