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: 2.3628522378631356
    b: -0.04599937142946242
    c: 1.2926650624252565
    d: 2.3334125418361715