text: import color, {hue} from "./color";
  import colorHsv from "./hsv";
  
  function hsv(hue) {
    return function(start, end) {
      var h = hue((start = colorHsv(start)).h, (end = colorHsv(end)).h),
          s = color(start.s, end.s),
          v = color(start.v, end.v),
          opacity = color(start.opacity, end.opacity);
      return function(t) {
        start.h = h(t);
        start.s = s(t);
        start.v = v(t);
        start.opacity = opacity(t);
        return start + "";
      };
    }
  }
  
  export default hsv(hue);
  export var hsvLong = hsv(color);
  