You Have Been Warned When You See It
This page is the CodyCross answer for the clue below from Medieval Times, Group 222, Puzzle 4 (Templar Order).
Question is: You Have Been Warned When You See It
and the answer is: YELLOW
Word Meaning:
YELLOW — The color of sunflower petals and lemons; the color obtained by mixing green and red light, or by subtracting blue from white light; the color evoked by light of wavelength around 580 nm; one of the three primary colors in subtractive color systems.
Definitions from Wiktionary.