// Inspired by https://github.com/material-components/material-components-ios/blob/bca36107405594d5b7b16265a5b0ed698f85a5ee/components/Elevation/src/UIColor%2BMaterialElevation.m#L61 const getOverlayAlpha = elevation => { let alphaValue; if (elevation < 1) { alphaValue = 5.11916 * elevation ** 2; } else { alphaValue = 4.5 * Math.log(elevation + 1) + 2; } return (alphaValue / 100).toFixed(2); }; export default getOverlayAlpha;