Language > I > INI file

Though if you have any = in the “textlines under the [name]”, the = will be red and the text to the left will be blue italics (in the default styerls.xml theme; your selected/customized theme may use different colors):

If you don’t like the = behavior , then you could define a simple UDL instead of using the built-in INI language: in Language > User Defined Language > Define your language, create a new language (named AI Music or something); leave most as the default settings, but on the Operators & Delimiters page, for Delimiter 1 style, set Open = [ and Close = ], and set the Styler to your preferred color (bold and purple to match INI, or whatever you want).