Notepad++ User Defined Language for Yara rules that is meant to be used for dark themes.
My main motivation is to have a UDL that prevents errors when writing Yara rules.
E.g., if you have the pattern $btc = "[13][a-zA-Z0-9]{27,34}" did you really mean to search for the regex or for the bitcoin addresses?
Open Language -> User Defined Language and import the .xml file. You may have to restart Notepad++ to see the language in the menu.
Alternatively copy the xml into %APPDATA%\Notepad++\userDefineLangs