I was reading this article about Metro UI designs, and I was struck by this statement:
Example, if you look under the hood of a new car, you will see areas colored yellow whereas the rest is the same color of the engine etc. Car manufacturers do this on purpose, they want you to touch yellow yourself but if it is not yellow and you are not mechanically minded – leave alone.
The author recommends using a color like Yellow as the secondary color as a means to draw people’s attention to the fact "I’m ok if you touch this, you won’t break anything if you do" thinking .I am a little unsure about this mentality that if you see something which is marked a different color other than the primary or background color,you would immediately mark it as a safe.
What are your views on it?