Indigo or Navy Design for a House
This page is the CodyCross answer for the clue below from Greece, Group 673, Puzzle 3 (Feta Cheese).
Question
Indigo or Navy Design for a House
Answer
BLUEPRINT
Word Meaning:
BLUEPRINT — A type of paper-based reproduction process producing white-on-blue images by means of a photosensitive ferric compound, used primarily for technical and architecture's drawings, now largely replaced by other technologies.
Definitions from Wiktionary.