/**
 * Not symmetric, requires a foreground (text) color, and a background color
 * @param {import("../types.js").ColorTypes} background
 * @param {import("../types.js").ColorTypes} foreground
 * @returns {number}
 */
export default function contrastAPCA(background: import("../types.js").ColorTypes, foreground: import("../types.js").ColorTypes): number;
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