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: -0.17786621128628832
b: -2.292022887619761
c: 2.2443550852640195
d: -2.0457028222154143