deutan

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

npm install deutan

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

• simulate(color, severity?) → hex, as deuteranopia 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.