/usr/share/source-highlight/json.style is in libsource-highlight-common 3.1.8-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | string red b;
keyword blue;
number blue;
type pink;
normal black;
symbol blue;
// for JSON
key bg:black;
keyquote bg:black;
valquote red;
colon cyan;
|