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: 0.4269438403985375
    b: 2.734245310114545
    c: 1.9492391940184284
    d: -1.1774819767477216