tailspin VS grc

Probably not as efficient, but I've been happily using grc [0] for the past several years. It handles simple rules quite well - beyond the basic info/debug/error coloring I use it for QOL such as different colors for even/odd timestamps and highlighting decimal places in large numbers.

[0] https://github.com/garabik/grc

A fairly simple program which only colorizes is grc. I wrote acolor in a similar vein, but it uses arbitrary programs/scripts instead of pure regex, and I've only written support for the programs I use, so no tcpdump. Don't use it unless you want to write your own colorizing scripts (if you do, please contribute!)

You may want to check https://github.com/garabik/grc

You'll probably appreciate grc.

There's this, which is a more modern dig, with color output, among other things: https://github.com/ogham/dog

There's also stuff like this, which will postprocess & color output from any command: https://github.com/garabik/grc, or https://github.com/armandino/TxtStyle

I also found grc and wrote my own conf.latexmk:

Conversely if you want to add color to a command, I have found Generic Colorizer to be useful: https://github.com/garabik/grc

Last few streams I was working on a re-implementation of grc with more modern Python syntax and updated packaging meta-data.