fill Extrusion Color As Expression
The base color of the extruded fill. The extrusion's surfaces will be shaded differently based on this color in combination with the root light
settings. If this color is specified as rgba
with an alpha component, the alpha component will be ignored; use fill-extrusion-opacity
to set layer opacity. Default value: "#000000".
This is an Expression representation of "fill-extrusion-color".