Final answer:
The colors of the 'WRONG WAY' or 'DO NOT ENTER' signs are red and white.
Step-by-step explanation:
The colors of the 'WRONG WAY' or 'DO NOT ENTER' signs are red and white. These signs use a combination of these two colors to ensure visibility and convey a clear message to drivers.
Red is often used in traffic signs to indicate prohibitions and warnings, while white is used as a background color to enhance visibility.