crossword-8.x-1.x-dev/modules/crossword_colors/crossword_colors.routing.yml

crossword_colors.settings:
  path: '/admin/config/crossword/colors'
  defaults:
    _form: '\Drupal\crossword_colors\Form\CrosswordColorsConfigForm'
    _title: 'Configure Crossword Colors'
  requirements:
    _permission: 'configure crossword colors'