Is your palette colorblind-safe? Check and fix color palettes for color-vision deficiency (protan, deutan, tritan) with the published OpticQuiz engine — Machado 2009 + CIEDE2000.

Color accessibility engine. Checks palettes for colorblind-safety (protan/deutan/tritan, Machado 2009, scored with CIEDE2000), fixes failing palettes, and checks WCAG contrast. Zero dependencies.

The madeofcode TextMate theme for the Pi coding agent TUI, with protan and tritan colorblind-safe variants.

MCP server that lets an LLM (Claude, Cursor, etc.) see a color or an image the way a colorblind person does — recolors PNG/JPEG for protan/deutan/tritan. Built on the published OpticQuiz engine (Machado 2009).

See a color, a palette, or a whole image as a colorblind person does. Recolors PNG/JPEG for protanopia, deuteranopia, and tritanopia — built on the published OpticQuiz engine (Machado, Oliveira & Fernandes 2009).

MCP server that lets an LLM (Claude, Cursor, etc.) check whether a palette OR an image is colorblind-safe, simulate color-vision deficiency, and check WCAG contrast — built on the published OpticQuiz engine (Machado 2009 + CIEDE2000).

Simulate protanopia (red-blind) color vision — a typed shortcut over cvdsim / the OpticQuiz engine (Machado, Oliveira & Fernandes 2009).

Generate, check, and fix colorblind-safe color palettes — protanopia, deuteranopia, tritanopia. Built on the published OpticQuiz engine (Machado 2009 + CIEDE2000) with the Okabe-Ito safe palette.

CI-friendly accessibility audit for chart color palettes: WCAG non-text contrast, colorblindness (CVD) simulation with the published Machado 2009 matrices, and perceptual OKLab ΔE separation. One engine, four faces: typed API, CLI, CI gate, MCP server.

Simulate the three dichromacies — protanopia, deuteranopia, tritanopia — for a color or a whole image. Umbrella over cvdsim / the OpticQuiz engine (Machado 2009).

Contrast-, CVD-, and grayscale-audited categorical, sequential, and diverging chart palettes, with matched dash / decal / shape encodings.

MCP server exposing the OpticQuiz color-accessibility engine as callable tools for LLMs (Claude, Cursor, etc.): colorblind-safe palette checks, color simulation, and WCAG contrast.

Generate Ishihara-style pseudoisochromatic color-vision test plates — a digit hidden in a dot field that collapses under protanopia, deuteranopia, or tritanopia. Reproducible from a seed. Built on the OpticQuiz engine (Machado 2009 + CIEDE2000).

Advanced color operations MCP server with Material Design 3 support, CSS theme matching, image color extraction, and accessibility compliance. Features HCT color space for perceptually accurate operations.

🌈 Shift RGB values into colorblind-safe colors with ease! 🎨

Scientifically accurate color-vision-deficiency simulation and simulated-space WCAG contrast — Viénot 1999, Brettel 1997, Machado 2009 in linear RGB, validated against DaltonLens