Function of

resources/vega.min.js:9137–9139

(t, e, n, r)

    );
  }
  function of(t, e, n, r) {
    return 1 === arguments.length ? rf(t) : new af(t, e, n, null == r ? 1 : r);
  }
  function af(t, e, n, r) {
    ((this.r = +t), (this.g = +e), (this.b = +n), (this.opacity = +r));
  }