protanopia

Simulate protanopia (red-blind) color vision — the color, or a whole image, as a protanopia viewer sees it. A typed shortcut over cvdsim: every call is cvdsim's with the deficiency fixed to protan.

npm install protanopia

const protanopia = require("protanopia");
protanopia.simulate("#d7191c");                 // that red as protanopia sees it
const png = protanopia.simulateImage("./chart.png");  // PNG Buffer, recolored
require("fs").writeFileSync("chart-protan.png", png);

• simulate(color, severity?) → hex, as protanopia sees it.
• simulateImage(input, opts?) → a recolored PNG Buffer (PNG/JPEG in; path, Buffer, or data URI).

Built on the published method: https://doi.org/10.5281/zenodo.21310578 · A screening/design aid, not a clinical tool.

Licence

MIT.