The intended use case for this script is to improve workflows where hexadecimal, decimal, and normalized values (0-1) are employed.
-d2h, --dec-to-hex <0-255>
-n2h, --norm-to-hex <0-100>
-h2d, --hex-to-dec <00-ff>
-h2n, --hex-to-norm <00-ff>"
$ sh hex -h2d ff ff ff
255 255 255
$ sh hex -d2h 255 255 255
#ffffff