--greyscale-max
 * @param {Float} $opacity - opacity value between 0.1 and 1, to one decimal place
 *
 */
/**
 * Return a color from a color palette
 *
 * @param {String} $name - name of the color to insert
 * @param {Arglist} $keys - 0 to 2 paramaters defining map and opacity
 *
 */
/**
 * Returns either a dark or light foreground color when given the background color
 *
 * @param {Integer|String} $bgcolor - number for grays, string for colors
 * @param {Map} $map - the color map to use
 *
 */
/**
 * Calcu