One of the Four Printing Colours, a Purple-Red
Puzzle 2 of Noisy Things Piece of Cake Pack
Question is: One of the Four Printing Colours, a Purple-Red
and the answer is: MAGENTA
Word Meaning:
MAGENTA — A color which is close to the equal mixture of red and blue which is an additive secondary color but a subtractive primary color evoked by the combination of red and light blue.
Definitions from Wiktionary.