On: Bashfill – art for your terminal

[hk__2]

You can’t. It uses characters for pixels so you have either scale up your terminal or use a graphical image display.

[irth → hk__2]

You can use braille unicode characters for sub-character dots as in https://github.com/rastapasta/mapscii

[hk__2 → irth]

Yes but you can’t use different colors for different dots in the same character.