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: 0.5361326344380482
b: -3.0615351823886905
c: -2.9087551741309223
d: -2.7926442201527117