Crossword puzzle clue "like a dark room"

Source of "Say! In the dark? Here in the dark! Would you, could you, in the dark?"

Like a dark room

"It builds strong bones, but who cares in this dark, dark world..."

Dark as dark can be

Dark purplish-brown to dark red

Possibly the first thing you'd touch in a dark room

Some dark-room equipment

Character who runs around in a dark room munching yellow pills while repetitive electronic music plays