Type Alias ReachableRangeFillConfig

CSS colours of the bands, the innermost band first, starting over after the last. An empty list counts as unset. The bands then ramp from the map's accent toward its land colour, the other way round for 'inverted', which deepens away from the origin.

How the bands are filled.

• 'filled' — each band coloured, the innermost on top.
• 'outline' — only each range's border, thick and coloured.
• 'inverted' — the area outside each range coloured: the world beyond the largest range, then a ring between each range and the next smaller one.