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: 2.2615846002582245
    b: -2.420612773922609
    c: 0.7470976081839393
    d: -1.7917414589192844