Blue is the color of the sky and sea. It is often associated with depth and stability. It symbolizes trust, loyalty, wisdom, confidence, intelligence, faith, truth, and heaven. Blue is considered beneficial to the mind and body. It slows human metabolism and produces a calming effect.
1 Backlash (sociology), an adverse reaction to something that has gained prominence.  Backlash (pressure group), a UK group opposing the 2008 law criminalising possession of extreme pornography.
backlash â An overrun of a revolving-spool reel, such as a bait-cast reel, which in turn causes the line to billow off the reel and tangle. back-trolling â A method of boat control utilizing a motor to make a series of maneuvers in the presentation of a lure or bait.