 Color value
 *
 * https://lnikki.la/articles/sass-better-colour-based-on-brightness/
 * http://robots.thoughtbot.com/closer-look-color-lightness
 *
 */
/**
 * Map deep get
 * @author Hugo Giraudel
 * @private
 *
 * @param {Map} $map - Map
 * @param {Arglist} $keys - Key chain
 * @return {*} - Desired value
 *
 */
/**
 * Map key get
 * Check if a key exists in a map, return it
 * @private
 *
 * @param {Map} $map - Map
 * @param {String} $value - Key name
 * @return {*} - Key name, if found
 *
 */
/**
 * Sty