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: 2.7487762400890086
b: -0.48449395027075015
c: 0.4470558321267295
d: 1.4777659787665396