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: -1.4487330132842189
    b: -0.8419188388933239
    c: -0.77638417397052
    d: 1.7130924962000034