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.
an effect or result, often indirect or remote, of some event or action: The repercussions of the quarrel were widespread. 2. the state of being driven back by a resisting body. 3. a rebounding or recoil of something after impact. 4. reverberation; echo.