@kcuf/mere-color/dist/cjs/a11y/a11y-contrast.js

Mere color utils for generating, manipulation, a11y purposes.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = a11yContrast;
var _util = require("../util");
var _a11yLuminance = _interopRequireDefault(require("./a11y-luminance"));
/**
 * Returns a contrast ratio for a color pair [1-21].
 *
 * http://www.w3.org/TR/WCAG20/#contrast-ratiodef
 */
function a11yContrast(fgc) {
  var bgc = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '#fff';
  return (0, _util.computeContrast)((0, _a11yLuminance.default)(fgc), (0, _a11yLuminance.default)(bgc));
}