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: 0.1215693276459775
    b: -0.37471687054793357
    c: 0.5581213726424163
    d: -2.6821886601369775