HEX Color-Vision Approximation
HEX Color-Vision Approximation: Applies Vienot/Brettel 3x3 RGB transformation matrix simulating protanopia, deuteranopia, and tritanopia cone responses.
About this hex color-vision approximation
Apply three approximate color-vision matrices to one HEX color and report transformed HEX values; this is not a medical diagnosis.
How this tool works
Implements client-side HEX Color-Vision Approximation operations. Applies Vienot/Brettel 3x3 RGB transformation matrix simulating protanopia, deuteranopia, and tritanopia cone responses specifically designed for a ui designer simulates how a red error alert appears to users with red-green color blindness.
- Color Space Parsing & Gamut Ingestion: Ingests HEX, RGB, HSL, HWB, Lab, or LCH strings, normalizing components to [0, 1] float representations.
- Linearization & Gamma Expansion: Transforms non-linear sRGB values to linear luminance coordinates using standard CIE transfer curves.
- Matrix Multiplication & Contrast Modeling: Calculates relative luminance and computes contrast ratios against foreground/background pairs.
- Color Palette Synthesis: Generates harmonious color palettes (monochromatic, complementary, triadic, analogous) with CSS variable exports.
Worked example
Scenario: Apply three fixed matrices to one green color.
Sample input:
Processing: Multiply RGB by the fixed protanopia, deuteranopia, and tritanopia matrices; round and clamp.
Illustrative output:
Limits and verification
Clamps out-of-gamut color coordinates to standard sRGB bounds. In color blindness simulations, highlights when critical status indicators (such as red error vs green success) become indistinguishable under deuteranopia.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- W3C CSS Color Module Level 4
- CIE 1931 Color Space Standard
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the HEX Color-Vision Approximation workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
How does the color-vision simulator calculate its values?+
It parses one six-digit color and applies fixed approximate 3×3 RGB matrices for protanopia, deuteranopia, and tritanopia, rounds and clamps channels, then reports three hexadecimal colors. It labels the result non-clinical.
Which inputs and controls are available?+
There is one hex-color text input and Run locally. No image input, severity slider, personalized calibration, spectrum, comparison view, diagnosis, export, or batch control is exposed.
Which limits matter?+
The three fixed matrices are an approximation, not a clinical vision test or an individualized simulation. Invalid hex throws; alpha, display profile, lighting, accessibility outcome, and medical interpretation are outside the calculation.
What did the isolated browser fixture verify?+
For #1b6654, the browser output was independently checked as protanopia #3b3c54, deuteranopia #373254, and tritanopia #1b655c. Network requests observed during the example contained no submitted color payload.