Pygments is a syntax highlighting tool that supports a wide range of languages and data formats.
Syntax rools from https://github.com/1c-syntax/1c-syntax
$ pip install pygments-bsl
$ python setup.py sdist
Pygment json highlighting is available without any further customization from code as well as from the pygementize command:
$ pygmentize your-file.bsl
... beautifully formatted bsl will flow here