You might be surprised to know it in fact is not gray. ;)
I found out that mine is gold.
What Color is Your Brain?
At work or in school: I like set routines and organized ways of doing things. Rules and directions are a great help to me. I prefer to stay on one topic at a time. I need to know what is expected of me, and I always want to know if I am on the right track. I like subjects that are useful and traditional, such as business, accounting, history and government.
With friends: I prefer people who are careful with their money and who make plans ahead of time. I like my friends to be loyal, dependable and on time. I am serious about love and show it in many practical ways.
With family: I like stability and security and enjoy traditions and frequent celebrations. I like to spend holidays with family members, and I plan ahead for such gatherings.
What color is your brain?
Most of the above is pretty accurate. And since living in Taiwan, although I prefer plans ahead of time, I've learned to fly by the seat of my pants too. :)