(@ brightness.average:r color +-                 (@ brightness.hypotenuse:r color +-
    (" color.                                        (" color.
        (# round ((/ 3) (+ red                           (# round (# sqrt ((/ 3) (+ (** red)
                           green                                                    (** green)
                           blue)))                                                  (** blue)))))
    )                                                )
+                                                +
    {rgb} color                                      {rgb} color
)                                                )













