@atlaskit/tokens/dist/es2019/utils/hct-color-utils/lab-invf.js

Design tokens are the single source of truth to name and store design decisions.

export function labInvf(ft) {
  const e = 216.0 / 24389.0;
  const kappa = 24389.0 / 27.0;
  const ft3 = ft * ft * ft;
  if (ft3 > e) {
    return ft3;
  } else {
    return (116 * ft - 16) / kappa;
  }
}