Blue - A Box of Crayons Traditional Cache

The color of ocean and sky, blue is perceived as a constant in our lives. As the collective color of the spirit, it invokes rest and can cause the body to produce chemicals that are calming.

President Martin VanBuren is credited with introducing blue into the decorating scheme of the White House in 1837 and since then, there has been a "blue room" in the White House.

Owls are the only birds that can see the color blue.

Mosquito's are attracted to the color blue twice as much as to any other color.