Quoting from the home page of JSON
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate.
Colour for text and null values.
Colour for numbers.
Colour for true and false values.
Colour for void values.
Background for Objects.
Background for Arrays.
Background for Object name/value pair tables.
Background for Array value tables.
Individual 'words' that are extremely long may be broken into two or more lines to conserve horizontal space.