For its boxes, Tiffany chose a shade of this primary color, recognized as a trademark today
The rule of the establishment is ironclad, never to allow a box 
bearing ... Non-primary colors are more calming than primary colors, however;... [DOC] [TLE] Color Psychology | Prestige Printing & Graphics [PAR] Feb 1, 2014 ... Why pick colors randomly when you can pick them strategically?