Why shellharden does not output background colors in Terminator?

Question

I have installed shellharden, a library that allows to output shell syntax issues (like missing double quotes) in a shell / bash script.

Output should highlight double quote issues with a different background color (See this scrrenshot from documentation https://raw.githubusercontent.com/anordal/shellharden/master/img/ex-artificial.png)

In default Ubuntu terminal, shellharden background colors are correctly rendered.

In Terminator shell, shellharden background colors are missing.

Legend: Default terminal at left: colors ok Terminator at right: missing colors

The command I run was:

~/.cargo/bin/shellharden --syntax-suggest ~/path/to/script

Do you have any clue to this difference? Should Terminator be run with any option? Thanx for your help.

Edit after Shellharden's author answer:

• my Ubuntu version is 16.04
• my Terminator version is 0.9.8

Note: I do not have 10 reputation yet, so I cannot embed my own images. I add screenshot links.

Answer 1

Shellharden author here.

Shellharden uses 24-bit colors. It could be that your version of terminator does not support that (terminator 1.91 works here).

Wikipedia has a list of which terminals support 24-bit color.

You can try this to test if your terminal supports 24-bit colors:

printf '\e[1;3;4;5;48;2;176;255;255;38;2;255;128;0mcarrot in the sky with underline\e[m\n'