I never really thought about why a company choses a colour over another one for their logo. However, this picture does seem to indicate that a lot of companies are thinking along the same lines.
Thanks to Phil Gyford for the image!
I already know that part of my thumb is about an inch long, so I can use that as a (somewhat small) ruler – ergo the “rule of thumb”. There are many other such tricks out there that range from the interesting to the truly useful (YMMV) and there is even a web site: RulesofThumb.org where you can peruse these!
If you like trivia like I do, give it a try!
And this being the internet, I am sure I will get comments on the origin of “rule of thumb”…