HastyHex is a blazing fast hex dump utility with optional ANSI color output. It performs about one to two orders of magnitude faster than your typical implementation of hexdump or od. It's is written in plain old ANSI C, so you can run it literally anywhere.

HastyHex produces color output by default regardless of what's connected to the output. The -p option turns off color.

usage: hastyhex [-fhlp] [-o FILE]
  -h       print this help message
  -l       force output line-buffered
  -f       force output fully-buffered
  -o FILE  output to file instead of standard output
  -p       do not output color ("plain")

The less pager has a -R argument that understands ANSI color escape sequences, making it a great candidate for accepting output from HastyHex.

$ hastyhex data.bin | less -FRX

The -f option increases the output buffer size which typically improves performance. Since MSVC doesn't support line-buffering, -l will be equivalent to -f on Windows.