Tiffany and Co. has a registered trademark on its signature shade for which of these colors?

little b, little b, You better not look outside then, it's blue everywhere for as far as the eye can see. 🙂

There are studies which shows Tiffany Blue increases the heart rate by 20 to 22% in the recipients, but could also be the anticipation of what is inside of a Tiffany gift box, especially a ring box.