Create a colorized hex dump of byte string.

Output looks something like the following, but colorized.

  000352c0:  ed 33 8c 85 6e cc f6 f7  72 79 1c e3 3a b4 c2 c6  |.3..n...ry..:...|
  000352d0:  c8 8d d6 ee 3e 68 a1 a5  ae b2 b7 97 a4 1d 5f a7  |....>h........_.|
  000352e0:  d8 7d 28 db f6 8a e7 8a  7b 8d 0b bd 35 7d 25 3c  |.}(.....{...5}%<|
  000352f0:  8b 3c c8 9d ec 04 85 54  92 a0 f7 a8 ed cf 05 7d  |.<.....T.......}|
  00035300:  b5 e3 9e 35 f0 79 9f 51  74 e3 60 ee 0f 03 8e 3f  |...5.y.Qt.`....?|
  00035310:  05 5b 91 87 e6 48 48 ee  a3 77 ae ad 5e 2a 56 a2  |.[...HH..w..^*V.|
  00035320:  b6 96 86 f3 3c 92 b3 c8  62 4a 6f 96 10 5c 9c bb  |....<...bJo..\..|

In the future, we will make the colorization more customizable and allow the groupings to be selectable at 2, 4, 8 or 16.