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: -0.14516060841209066
    b: -0.6119640067622041
    c: -2.2580202845125843
    d: 2.2717892910024027