@amcharts/amcharts5/.internal/themes/ColorblindTheme.js

amCharts 5

import { Color } from "../core/util/Color";
import { Theme } from "../core/Theme";
/**
 * "Colorblind" — a color-vision-deficiency-safe qualitative palette based on
 * the Okabe-Ito eight-color set, which stays distinguishable under the common
 * forms of color blindness (protanopia, deuteranopia, tritanopia).
 *
 * Like `Dataviz` and `Kelly`, this theme only sets the series palette; it does
 * not change interface colors, so it layers cleanly on top of the default
 * (light) look. The canonical Okabe-Ito order leads with black; here the eight
 * colors are re-ordered to lead with color so the first series reads as a hue,
 * with black kept in the set for later series.
 *
 * @see {@link https://jfly.uni-koeln.de/color/} for the original palette
 * @see {@link https://www.amcharts.com/docs/v5/concepts/themes/} for more info
 * @important
 */
export class ColorblindTheme extends Theme {
    setupDefaultRules() {
        super.setupDefaultRules();
        this.rule("ColorSet").setAll({
            colors: [
                Color.fromHex(0xe69f00),
                Color.fromHex(0x56b4e9),
                Color.fromHex(0x009e73),
                Color.fromHex(0xf0e442),
                Color.fromHex(0x0072b2),
                Color.fromHex(0xd55e00),
                Color.fromHex(0xcc79a7),
                Color.fromHex(0x000000) // black
            ],
            // Loop the safe set rather than generating off-palette colors, which
            // would break the color-blindness guarantee.
            reuse: true
        });
    }
}
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