Colors not working in macOS terminal

[dllu]

On macOS terminal.app:

Meanwhile on Linux, the exact same pup.txt works perfectly.

Any ideas why?

[Talinx]

Which version of jp2a are you using?
The version on Homebrew is pretty old, better color support has been added in v1.0.9.

[dllu]

Not sure, but version mismatch wouldn't explain why the same pup.txt would look fine on Linux but not in macOS.

https://gist.github.com/dllu/bb108d8365ffba191472635f4bc32c28

[Talinx]

According to https://github.com/termstandard/colors#not-supporting-truecolor Terminal.app does not support 24-bit truecolor, therefore pup.txt does not work. That's currently my best guess. Unfortunately I don't have a Mac so I can't debug this properly.
(jp2a should automatically use ANSI color (4-bit) if truecolor is not supported.)