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: 0.21105927053017037
b: -1.229427337322494
c: 0.7390531861437504
d: -1.7145471694406043