[
  (lookaround_assertion)
  (inline_flags_group)
  (character_class)
  (anonymous_capturing_group)
  (named_capturing_group)
  (non_capturing_group)
  (count_quantifier)
  (character_class_escape)
] @rainbow.scope

[
  "(?" "(?:"
  "(?<" "(?P<" "(?P=" ">"
  "(" ")"
  "[" "[:" ":]" "]"
  "{" "}"
] @rainbow.bracket