bgHwb method Null safety

Chalk bgHwb(
  1. num hue,
  2. num whiteness,
  3. num blackness
)

Alternate name for onHwb() (provided for legacy compatibility with JS Chalk)

Implementation

Chalk bgHwb(num hue, num whiteness, num blackness) =>
    onHwb(hue, whiteness, blackness);