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: -0.7572273915974934
    b: 2.825327180334779
    c: 2.7238124522218685
    d: -1.6407376655360901