click:     refresh

    a:         move mouse left/right 
    b: shift + move mouse left/right 
    c: ctrl  + move mouse left/right 
    d: alt   + move mouse left/right 

    color = rgba(a, b, c, d) with mapped domain
  

  
    a: -1.5995826660582855
    b: -2.002784071661507
    c: 3.119578333723701
    d: -3.000953406705351