getFillRgba

Engine RGBA for a shape's interior. 0 means "no fill".

The fill *styles* and the palette *tokens* share names but are one step apart, which is easy to get wrong: semi paints the paper colour with a barely-there tint, solid paints the hue's pale tint (the semi token), and only fill paints the hue at full strength (the solid token). That table is stated once, in DEFAULT_FILL_TOKENS, and read here rather than restated — the stroke always uses the full-strength colour, so a solid fill reads as a pale body inside a saturated outline.